When it comes to hydroponics, people often neglect the importance of water quality in their systems. They get all the proper lighting and nutrients, without realizing that the most important ingredient is water.
To properly grow your crops, you need to provide them balanced nutrients. However, even tap water has various contaminants that can knock-off the nutrients balance and prevent proper growth. On the other hand, with an RO System, you will get perfectly clean and balanced water – ideal for optimal growth. A best RO system for growing will prevent alkalinity, hard water, and other undesirable stuff.
- Best RO System for Hydroponics | Comparison Table
- Top 16 Best Reverse Osmosis Systems for Growing | Reviews
- 1. LiquaGen 4-Stage Hydroponics RO Water Filtration System
- 2. Home Master HydroGardener TMA-HG Water Filtration System
- 3. Home Master HydroGardener TMA-HG-Pro Pro Advanced Water Filtration System
- 4. Home Master TMAFC Artesian Full Contact Undersink RO System
- 5. Hydro-Logic 31035 100-GPD Stealth-RO100 Reverse Osmosis Filter
- 6. FS-TFC Reverse Osmosis Filtration System Under Sink Water Filter
- 7. Hydro-Logic 31040 300-GPD Stealth-RO300 Reverse Osmosis Filter
- 8. Hydrofarm AARO312 Two-Stage Reverse Osmosis System
- 9. 3 Stage – Hydroponics Reverse Osmosis Water Filtration System
- 10. Hydroponic (Plant Growth) – High-Efficiency Permeate Pumped Reverse Osmosis Water Filter System
- 11. 4 Stage – Hydroponic Reverse Osmosis Filtration System
- Best RO System for Growing Room | Reviews
- Best RO System for Commercial Growing | Reviews
- Best RO Booster Pump for Growing | Review
- Buying Guide | RO System for Growing
- Why Growers Should Use Reverse Osmosis Water Systems for Hydroponics?
- Hard Water – Bad for Growth
- What Are the Benefits of RO Systems for Hydroponics?
- What Is Reverse Osmosis and How Does It Work?
- Why Do You Need RO for Perfect Growth?
- Reverse Osmosis Water Helps Grow Cannabis
- Simple Guidelines for PPM Management
- RO Water System or Whole House Activated Carbon | What to Choose for Optimal Growth
- Amount of Water That Gets Wasted
- The Water pH
- RO Filtration Stages
- The Number of Sediments
- How to Install an RO System
Best RO System for Hydroponics | Comparison Table
Top 16 Best Reverse Osmosis Systems for Growing | Reviews
1. LiquaGen 4-Stage Hydroponics RO Water Filtration System
|Performance||Removes up to 99% of contaminants|
|Original||Manufactured in the USA|
|Advantage||Comes with premium, long-lasting filter|
|3 stage hydroponics system||Polypropylene sediment, RO membrane, and UDF Activated and Coconut carbon|
|50-100 PSI operating pressure|
Several things made us consider this fantastic system for review. At first, it’s 4-stage filtration is amazing. The first filter is Polypropylene sediment, which removes dust and various large particles. It directly affects the lifespan of other filters, especially the RO membrane.
The other two filters are UDF Activated Carbon and Coconut Carbon. They remove chlorine, organic chemicals, and VOCs, while at the same time, they help water get rid of unpleasant taste and odor. At the end of the system, there is a powerful Reverse Osmosis membrane.
This system operates under the pressure of between 50 and 100 PSI. You can also run it on 45 PSI, but the flow rate will be very low. Also, the system is tested at regular temperatures, so extremely cold or hot water will destroy it.
We are also amazed by how simple it is to install the unit. Besides, it’s economical and easy to maintain and is perfect for city water. If you’ve never bought a RO system for growing before, this unit is your best choice.
2. Home Master HydroGardener TMA-HG Water Filtration System
|Main Feature||Removes various chemicals as well as heavy metals|
|Weight||Only 5 pounds of weight|
|Advantage||Built-in Cal/Mag delivery system|
The beautiful thing that we noticed is that even the most demanding gardeners were satisfied with this system. It makes the water perfectly pure and provides an optimal, balanced pH.
However, what we like the most is its innovative design, which successfully eliminates common RO systems’ problems. For example, it won’t bore you with canister filter leaks, bad flow rate, acidic water, and similar. You can enjoy it with no fear.
This RO system for growing delivers pure and clean water through various steps. First, it uses catalytic carbon and sediment filtration, then the Reverse Osmosis, and then the Advanced Remineralization. The last step adds between 15 and 30 PPM of calcium and magnesium.
TMA-HG comes with a high-efficiency Reverse Osmosis membrane, which produces around 150 gallons of pure water daily. Besides, it has an excellent waste ratio of 2 to 1. It’s a lot better than most RO systems for hydroponics. The system also comes with various fittings and connections to make the installation as easy and simple as possible.
With a clear and concise user-manual and 5-year manufacturer warranty, you won’t have to fear about any irreparable damage. Besides, the customer support team is available at any time of day, every day. If any kind of problem occurs, they will help you out in no time.
3. Home Master HydroGardener TMA-HG-Pro Pro Advanced Water Filtration System
|Performance||Excellent for well water, can work at 35 PSI|
|Advantage||Comes with a variety of fittings for easier installation|
|Cal/Mag delivery system adds 15-30 PPM of calcium and magnesium|
This filtration system is like an improved version of the previous model. It’s a bit costly but comes with more great features. For example, it’s great for any water, including water from wells; the system can operate at pressure as low as 35 PSI.
Also, like the original model, it comes with a nice and precise user manual and a variety of connections. The package includes the under-sink ⅜-inch compression feed water adapter and the adapter for the garden hose.
However, the thing that differs this PRO model from the original is the efficiency of the RO membrane. It provides 130 gallons of pure water daily, at 1 to 1 waste ratio… Amazing! Besides, the filtration is slightly better and the system produces cleaner water. It also comes with a 5-year warranty.
4. Home Master TMAFC Artesian Full Contact Undersink RO System
|Performance||Provides 2000 gallons of clean water|
|Main feature||Removes around 98% of chemicals|
|Advantage||Comes with Fast-Flow RO Kit|
Home Master TMA-FC provided us with a variety of high-quality models through the years, so we did not doubt this system. It offers excellent filtration and restores the natural calcium and magnesium, which are usually removed.
The system features a fantastic Fast-Flow RO Kit. We all know that the RO filter can lower the flow rate sometimes, but not in this system. Its Fast-Flow kit doubles the flow from your faucet while improving water efficiency. The system reduces water waste by around 80% and doubles water production.
All Home Master systems use catalytic carbon filters which perfectly remove chlorine. They are different from standard units and remove most contaminants that standard media don’t. Of course, the system is simple to install and requires no maintenance.
In the end, the RO system for growing comes with a modular filter design. If you’ve ever used a traditional Reverse Osmosis system, you might have experienced canister filter housing problems. Instead of changing the filter housings, traditional systems allowed you only to replace filters. It caused sediment and various microorganisms to accumulate, which over time, led to canister leaking.
5. Hydro-Logic 31035 100-GPD Stealth-RO100 Reverse Osmosis Filter
|Performance||Produces around 100 gallons of ultra-pure water daily|
|Main feature||Removes 98% of contaminants|
|Advantage||Comes with Stealth RO100 filter|
If you are looking for the best quality to price ratio, this filtration system is your best choice. It uses three filtration stages and produces around 100 gallons of clean water daily. Besides, the system works effectively at the minimum pressure of 40 PSI.
We are also amazed by the water waste ratio of this system. It offers a ratio of 2:1, which is better than many RO systems for growing on the market. However, to keep the performance at the maximum level, you should replace filters every couple of months, and RO membrane every year. Also, depending on the water quality, the RO membrane can be effective for up to 16 months.
The system might be a bit bulky with over 10 pounds. However, it’s not a portable unit, so you won’t have to worry about its weight once you finish the installation. It comes with a clear and concise user manual, but still, their fantastic customer support team is available 24/7. It’s an excellent choice if you are looking for the best quality for your money.
6. FS-TFC Reverse Osmosis Filtration System Under Sink Water Filter
|Type of filter||5-stage filtration|
|Advantage||Each filter is individually wrapped|
|Performance||Up to 120 PSI pressure|
No matter which system you have, at some point, you will need to buy a refill kit. If you own FS-TFC 100G 5-Stage Under Sink Filtration System, this refill kit is the way to go. However, be aware that it’s not suitable for standard 10-inch RO systems.
The kit provides fantastic cleaning and removes up to 99% of contaminants. Besides chlorine, it successfully removes lead, arsenic, bacteria, heavy metals, and similar. It provides perfectly clean water, not only for hydroponics but for drinking as well.
7. Hydro-Logic 31040 300-GPD Stealth-RO300 Reverse Osmosis Filter
|Type of filter||Automatic shut-off cartridge|
|Advantage||Comes with wall-mountable metal bracket|
|Performance||Feed flow rate up to 2GPM|
If you are looking for a system that can deliver huge quantities of water every day, this unit is your best choice. It delivers amazing 200 gallons of water and is excellent for large families. Besides, the system eliminates 98% of contaminants, with only 25% of water waste.
The system also comes with a nice and useful plug-in-and-use technology. You don’t need any tools for filter-replacement, and there is almost no maintenance. On top of that, the system is an excellent energy-saver. It saves up to 25% of electricity, compared to many similar units.
The unit comes with a strong and durable mounting bracket and a smart auto cartridge. It offers a convenient switch-off technology, which prevents overflow. However, be aware that only one size and shape of the system is available.
8. Hydrofarm AARO312 Two-Stage Reverse Osmosis System
|Type of filter||Economical 2-stage system|
|Advantage||Ideal for small volumes of clean water|
|Main feature||Works with Aaro701 and Aaro610 replacement filters|
This relatively small RO system for growing is ideal for producing small volumes of water on demand. It comes with a heavy-duty carbon block which provides excellent filtration. Besides, you can choose between two different replacement filters, depending on how much money you want to spend.
This RO system for growing comes with a heavy-duty mounting bracket and weighs less than 5 pounds. Although pretty light, AARO312 is a strong and durable system, with an extended lifespan. However, it’s primarily made for chlorine removal. If you want the ultimate-filtration, this system won’t suit your needs.
9. 3 Stage – Hydroponics Reverse Osmosis Water Filtration System
|Type of filter||3-excellent membranes|
|Advantage||Comes with transparent cartridge|
|Main feature||Optimized mainly for plants|
This Oceanic system provides excellent 3-stage filtration. First, water goes through a sediment filter, which removes particles of 5 microns in size. Then, the water goes through the coconut carbon block, which removes unpleasant taste and odor, as well as cloudiness in water.
In the end, the water passes through a RO membrane, which removes selenium, fluoride, manganese, cadmium, barium, and similar.
Another fantastic feature that this system offers is a transparent cartridge. Simply look at the cartridge, and you will know if it’s time for a replacement. The system also comes with a garden hose, wrench, and ¼-inch tubing.
10. Hydroponic (Plant Growth) – High-Efficiency Permeate Pumped Reverse Osmosis Water Filter System
|Type of filter||4-stage filtration|
|Advantage||Comes with a rubber ring to prevent leaking|
|Main feature||Removes over 1000 contaminants|
|Application||Ideal for plants|
The first thing that caught our attention about this system is its filtration ability. As the company states, it can successfully remove over 1000 contaminants, including heavy metals, chlorine, lead, and bacteria.
Besides, the system can work at very low pressure, down to 30 PSI. It also increases delivery pressure at the garden hose at least two times. On top of that, the permeate pump requires no electricity to operate.
The system has four filtration stages. Besides the sediment and carbon block, there is also a GAC and a Reverse Osmosis membrane. It can deliver around 150 gallons of perfectly clean water every day.
11. 4 Stage – Hydroponic Reverse Osmosis Filtration System
|Type of filter||4-stage filtration|
|Advantage||The system comes pre-assembled|
|Main feature||Removes bad taste and odor|
This filtration system significantly helps your water get rid of bad taste and odor. We tested it with very contaminated water, and it came out perfectly clean. It comes with 4-stage filtration, which includes two carbon blocks, a sediment filter, and a Reverse Osmosis membrane.
Besides, the system is pre-assembled, which means very easy installation. It comes with a concise manual, but most probably, you won’t even need it. After a couple of minutes, your system will be installed and ready for long use.
The system works at casual pressure, which ranges from 50 to 100. Also, it’s made to work under normal temperature, so don’t use it with extremely hot or cold water. Although it comes with a warranty, it doesn’t cover problems caused by improper use.
Best RO System for Growing Room | Reviews
12. Express Water Ultraviolet Reverse Osmosis System
|Type of filter||360-degrees swivel faucet|
|Advantage||Deliver 100 gallons of clean water daily|
|Main feature||Filters over 100 major contaminants|
|Warranty||Comes with a 1-year warranty|
This Express Water RO system is ideal both for plant growth and health improvement. It delivers perfectly clean and safe water for the whole family. Besides, the system comes with a 1-year warranty, which grants its quality and long lifespan.
Another nice thing is that the system features a powerful UV sterilization. It removes Escherichia coli, as well as various bacterias, viruses, and microorganisms.
With around 28 pounds, the system is a bit heavy. However, it’s amazingly simple to install, and comes with a very clean and useful user-manual. Also, you don’t need to do any refilling or re-activating. When the tank gets empty, the system will fill it up automatically.
13. AquaFX 610074278870 Barracuda RO/DI Aquarium Filter
|Type of filter||Quick-connect fittings|
|Advantage||Deliver 100 gallons of clean water daily|
|Feature||Heavy-duty aluminum mounting bracket|
|Performance||Allows you to add 100 GPD with PiggyBack|
AquaFX Barracuda sells their system in a few variations. For example, you can choose between 50 and 300 gallons per day, choose supply type, and carbon type. Therefore, you can get a system with a kitchen faucet adapter, inline sink adapter, hose adapter, and a few more.
You can also choose between the standard carbon block, chloramine blasters, and high capacity carbon. Of course, all of the additions will increase the final price.
The system comes with a fantastic, 1-micron sediment filter. Besides, its carbon block and RO membrane do an excellent job at the water purification. The system is hand-built in their shops and is never outsourced. It comes in a nice package, which also includes a 10-inch canister filter wrench, and 6 feet of supply, drain, and product tube.
Best RO System for Commercial Growing | Reviews
14. iSpring RCS5T 500 GPD Commercial Grade Tankless Reverse Osmosis Water Filter System
|Type of filter||Dual-flow RO membrane|
|Main Feature||11-20 gallon optional storage tank|
|Performance||Delivers up to 500 GPD|
iSpring RCS5T is a lot different than most RO filters. But what makes the big difference? It’s the special dual-flow RO membrane, fueled by a strong electric booster pump. The pump results in the membrane receiving water from both sides of the housing, which allows an extremely high water delivery. The system can deliver up to 500 gallons of water every single day!
This RO system for growing is designed for high-demand environments but is also an excellent choice for restaurants or small businesses. It’s a bit heavy but still compact and easy to install and maintain. iSpring RCS5T is an excellent investment in the long run!
15. Hydro-Logic 31023 1000-GPD Evolution RO1000 High Flow RO System
|Main Feature||Polypropylene construction|
|Performance||Delivers up to 1000 GPD|
|2:1 water waste ratio|
First, let’s mention the system’s incredible ability to deliver lots of water. It’s able to provide up to 1000 gallons per day, which makes it ideal for multiple purposes. However, production is affected by water pressure and water quality.
Hydro-Logic 31023 is an efficient system. It has a 2:1 water waste ratio, and all the systems that waste below 4 are considered efficient. Besides, it’s very easy to install and doesn’t weigh too much. It comes with a nice user manual, but most probably, you won’t even need it.
Best RO Booster Pump for Growing | Review
16. Aquatec CDP 8800 High Flow Pressure Boost Pump 8852-2J03-B423 100GPD
- Manufactured in the USA
- Fits most Reverse Osmosis systems
Many plant growers face the problem of low flow-rate at some point. That’s why we decided to test this awesome booster pump and give you our impressions.
The pump is compatible with most RO units. It’s manufactured in the USA and made from strong, durable materials. Also, it requires no maintenance and is incredibly simple to install. If you are struggling with low flow rates, it’s an item that you should get.
Buying Guide | RO System for Growing
Why Growers Should Use Reverse Osmosis Water Systems for Hydroponics?
Water – The Most Important Ingredient
As mentioned, water is the most important ingredient in your hydroponics system. When it comes to the proper growth of your plants, it has the most significant impact. But how does the water affect crop growth? It’s very simple.
The nutrients that you buy are specifically designed to have the perfect balance of minerals to satisfy the crop needs. However, if the water already has some of those minerals, it ruins the balance.
For example, let’s talk about Alkalinity. If the water contains a high amount of dissolved carbonates of calcium and magnesium as ions, it’s considered to be Alkaline water. It directly affects pH balance in your growth medium, which significantly decreases your yields. However, all of that stuff can be properly removed by using Reverse Osmosis water filters.
Hard Water – Bad for Growth
Hard water is another thing that affects crop growth. It’s water that has high mineral content, even if the pH balance is fine. Over time, hard water can lock your plants’ vital elements and prevent the true harvest potential.
Some people use water softeners to handle water hardness. However, they only displace calcium and magnesium ions, while leaving carbonates behind. Besides, water softeners add sodium to the water, which is not what you want for proper growth.
What Are the Benefits of RO Systems for Hydroponics?
What Is Reverse Osmosis and How Does It Work?
Today, even the water that we drink can be full of various contaminants. In the long term, it can damage our health – but imagine the damage it can do to your crops! That’s why people use various methods of filtering water.
The simplest method is to boil it, but of course, it’s not ideal. Besides, you can purify the water via a chemical process. It usually includes infusing water with iodine, which kills pathogenic bacteria.
The newest method includes membrane water filtration, which further includes Reverse Osmosis. RO filters work by reversing the flow of osmosis so that the water passes from a more concentrated solution, which further results in a more diluted solution.
A good example of Reverse Osmosis filtration is the seawater purification. A dense solution (seawater) uses RO to turn itself into its dilute form (freshwater). The process includes a membrane with 0.0001-micron pore size, which allows pure water to pass through, and prevents larger molecules to do the same.
Why Do You Need RO for Perfect Growth?
You might be wondering if there is an accurate method to see if you need Reverse Osmosis water. Luckily, there is – all you need to do is to measure the PPM of your water. It’s the number of ions, known as “parts per million”. However, don’t get confused – pH is a measure of intensity, while PPM is a measure of quantity.
So, if your water is 10 PPM or below, it’s perfectly safe. If it’s over 10, you should get a RO system for growing. So, why do you need it, and what if you don’t get one? Well, in that case, all the contaminants from water would affect the properly balanced nutrition and have a direct impact on the growth of your crops.
Reverse Osmosis Water Helps Grow Cannabis
If you grow cannabis, there are a few things that you should know when it comes to RO systems for growing. At first, using a RO system can be amazingly beneficial. On the other hand, it can make other things a bit complicated.
For example, RO-filtered water has no minerals, leaving you responsible for the entire mineral content that your plants get. Also, RO water has no magnesium and calcium, so you should keep that in mind, too.
Shortly, Reverse Osmosis systems provide many benefits. However, you need to do a bit of math when it comes to minerals, or your plants will get depleted in a blink of an eye. It’s recommended to be used by people with strong skills in hydroponics.
Simple Guidelines for PPM Management
We mentioned that 10 PPM is the upper limit when it comes to ions in your water. But how to measure it? One of the possible solutions is to buy an alkalinity meter, but you can also use an Electrical Conductivity meter.
On the other hand, the most affordable method is to use test kits. It works by adding dilute acid which causes a color change in water. The test comes with a color chart, so when you compare it to the color of water, you will know how many PPM the water has.
RO Water System or Whole House Activated Carbon | What to Choose for Optimal Growth
Most people are convinced that Reverse Osmosis systems are the best solution for optimal growth. However, choosing the best RO system for growing can be a bit tricky. If a RO filtration unit is smaller than an industrial-scale unit, it might be a problem. All of those units will waste 3-7 times the water they deliver. In some states, buying a whole-house activated carbon filtration system might be a better solution.
This alternative is like a large water filter pitcher. You put the chlorinated water in, and de-chlorinated water comes out, with almost no waste. For example, If you live in California, it might be a much better solution. However, when it comes to growth, both solutions are good.
Amount of Water That Gets Wasted
The amount of wasted water is one of the first things to consider when buying an RO system. Most people think that Reverse Osmosis wastes tons of water. It does, but only when it comes to seawater. It contains lots of salt, which causes a significant amount of wasted water.
All the systems on our list are efficient and designed for home use. Every system indeed produces more or less wasted water, but there are other things to consider. For example, compared to the amounts of purified water that you get, the costs of wasted water are insignificant.
The Water pH
When talking about RO systems for growing, most people tend to mention the pH level of water. The fact is, the RO process makes the water acidic, which lowers the pH value. It’s because Reverse Osmosis removes lots of minerals from water, which directly affects its taste. It’s good for plants, but if you want to drink it, you should use a remineralization system. It will add all the exact minerals that you need.
RO Filtration Stages
When it comes to purification, you should know that it includes a few stages. Most units can provide up to seven stages. However, it doesn’t mean that the system is better if more stages are provided. For example, a 5-stage purification system can also do an excellent job, like the one with six or seven. You should also consider the number of contaminants in the water that you need to purify.
The Number of Sediments
You might have heard of TDS, which is the Total Dissolved Solids. It measures the total amount of sediments in your water. Those usually include chlorides, sulfates, and magnesium. A high-quality RO system can filter over 90% of these sediments from your water.
How to Install an RO System
Installing a RO system differs between units. However, let’s check a few basic steps that every installation includes.
First, check your user manual and look for a specified height for the assembly kit. Hang the assembly kit and turn off the valves for hot and cold water. Then, install the valve that comes with the unit.
You can notice that there is a colored supply line. Cut it properly to make sure that it doesn’t get twisted, and fasten the plastic tubing to the supply valve. If you are not sure what to do, most probably, there are pictures in your manual. Use them as a reference.
Also, it’s a good idea to shorten water supply lines, which will minimize the amount of tubing. Then, you need to attach the system lines to the faucet base. You will also notice black waste lines, but they are not connected to the supply. Those lines prevent potential sink backups.
Then, you need to install the drain line adapter. After you install it under the sink basket, simply cut the waste line, and push it into the adapter. The parts might be a bit fragile, so be cautious not to apply too much force.
After you set the storage tank in the proper position, install the final line. Sterilize the system according to instructions in the manual, and that’s it. Your system is installed and ready for use!
Is Reverse Osmosis Water Necessary for Hydroponics?
The idea of Reverse Osmosis is to get the ideal water “base” for proper nutrition. It is not necessary, but greatly affects the nutrition balance that your plants get. However, some systems are too much energy-intensive, which directly affects costs for water.
Is an RO System Worth It?
Yes, it is. It might seem like a big expense at the start, but it will pay off after a short period.
Is Reverse Osmosis Water Safe to Drink?
Yes, Reverse Osmosis water is perfectly safe to drink. However, the RO process often removes the essential minerals, creating so-called “dead water”. It might not be beneficial for your health, but it won’t cause any hazards.
What Is the Best Water to Use for Hydroponics?
We strongly advise you to use distilled water for your plants. Distillation is the process that separates components in a liquid by combining evaporation and condensation. Distilled water won’t add any extra minerals to the plants, allowing you to maintain the perfect nutrition balance.
How Often Should I Maintain my System?
Reverse Osmosis systems require almost no maintenance, which makes the usage very simple. You only need to replace filters every couple of months, and that’s it! Replacing the filter very simple to do, and you don’t have to be a DIY professional or a skilled plumber.
As you can see, getting a Reverse Osmosis system for growing your hydroponics has numerous benefits. You might need to invest a bit more in a high-quality system, but it will pay off in the future.
If you need lots of pure water every day, the best choice is HydroLogic 31023. On the other hand, if you are looking for the best quality to price ratio, HydroLogic 31035 is the way to go.