Best Reverse Osmosis System for Hydroponics in 2022

The term RO stands for Reverse Osmosis. It is a technology that purifies water using a semipermeable membrane to remove ions and large particles present in water. And hydroponics is a method of production where people grow plants in a highly nutrient solution instead of regular soil. So both of the terms are interrelated in the field of growing crops.

This method is trendy for the consistent and quick growth of crops like fruits, herbs, and veggies.

Growing crops with hydroponics depend on the plant’s roots in water with a precise blend of minerals. Most of the mineral composition is added with the grower. Still, the most important thing that plays a vital role in the success of hydroponics is purified water.

So, getting an excellent reverse osmosis system for your hydroponics is crucial to ample yields of the crops. In this review, 8 different systems will be very helpful to grow crops.

Top 8 Best RO Systems For Hydroponics

#1. iSpring RCC7 Reverse Osmosis System

Starting the reviews with a reverse osmosis system from iSpring that is best known for chloramine removal. It will give you the finest water for drinking as well as for hydroponics.

Easy Maintenance

Ensures very high reliability with high-quality components for easy maintenance and lasts all the years to come. The system is very highly durable and perfect for growing crops in hydroponics.

Baby Formula

With the crystal clear that comes every time you turn on the faucet, you can enjoy fresher coffee and tea, better-lasting foods, and good-tasting water as well. The water feels fresher every time with the Baby Formula.

Easy to Install

You can install this reverse osmosis system within a few hours without any type of professional help. There are also YouTube videos from the manufacturer to install this system in the main water supply.

Three Pre-Filters

Equipped with three pre-filters to get rid of the large contaminants as well as to protect the RO membrane. This feature can remove contaminants coming down to the size of 0.0001 microns.

NSF/ANSI 58 Certified

With the water filter mounted under the sink and water, softeners can remove contaminants up to 99 out of 100, which includes harmful substances like Lead, Fluoride, Calcium, Arsenic, etc.


  • A filter wrench is included for easy filter changes.
  • Leak-free installation.
  • No threading pipes are needed.
  • It has a 3.2-gallon holding capacity.


  • It wastes water a bit.


#2. APEC Water Systems Reverse Osmosis Drinking Water Filter System

You’ll get fresh drinking water and minerally balanced water for hydroponics with this filtration. In addition, the water you get is 100% contaminant-free.

Long-Lasting Filters

Premium and High-quality filter helps remove contaminants up to 100% such as odor, taste, VOCs, chlorine and some toxic substances like heavy metals, nitrates, arsenic, fluoride, and 1000 others.

Highest Dissolved Solids

This system’s maximum total dissolved solids highest, and it is 2000 ppm. The feed water pressure is pretty impressive at 45-85 psi.

Lead-Free Faucet

The system is designed with a lead-free faucet, and a tubing JG Food Grade certified. The parts of this system provide contamination-free and safe water for healthy drinking and healthy hydroponics.

Leak-Free Fittings

This system’s fittings come with stainless teeth to guarantee a solid grip. The special O-ring gives you a leak-proof seal, and no other extra leak detectors or clippers are needed.

APEC Carbon Blocks

It is uniquely designed with double carbon blocks to achieve the maximum chemical and chlorine removal rate. The large block works by maximizing the contact time and gives you a sense of water purification.


  • Affordable price.
  • Perfectly balanced minerals in the water.
  • Easy to install and easy to maintain.
  • WQA Certified.


  • Takes a lot of space under the sink.


#3. Waterdrop RO Reverse Osmosis Water Filtration System

This brand Waterdrop has more than two hundred filtration systems with relevant UL, WARS, UPC, WQA, CSA, and NSF certifications. All of the filters are top-notch for their 500 technical patents, and this system is fantastic too.


This RO filtration system is all-in-one as well as innovative on its own as a water purification system. This filter can be changed in three-second with a single turn. Tell me how amazing that is?

Composite Filters

One of its kind in the whole world with the first-ever filtration system with composite filters. The three layers provide filtration of seven stages with the pre-sediment and carbon block filter. There is also a membrane filter that improves efficiency.

Tankless Design

The composite filter already removes a lot of pollution. But this tankless design will help you to filter out the secondary pollution present in the water efficiently. It will also save you a lot of space.

Fast Filtration

You will not have to wait for clean water. The internal pump helps the system have a faster water flow which is usually 400 gallons per day. This filter can fill a cup very quickly in under 12 seconds.

Reverse Osmosis Technology

With this technology, the filtration accuracy comes down to 0.0001 micrometers. So, it can effectively remove the most hazardous yet tiny contaminants like TDS or Fluoride.


  • NSF certified performance.
  • You can connect it to the refrigerator to filter ice as well.
  • 1: 1 low drain ratio.
  • World’s first composite filters.


  • Installation is pretty tricky.


#4. Home Master Undersink Reverse Osmosis Water Filtration System (7 stages)

No compromises, only perfect solutions for your precious hydroponics. The filtration system perfects your water to not use water with harmful contaminants that destroy everything.

Highly Mineral

In this filter, there is a patented remineralization system that will add magnesium and calcium twice in the purification process. At last, you will have water that tastes great, and it is highly mineral.

Faster Flow Rate

The filter comes with a Fast Flo Kit that has larger tubing and fittings. Bot. Both of them will provide you with speed faster in two times than all the other traditional RO systems in the market.

Non-acidic Water

The Traditional RO system gives you pure water but is slightly acidic. While the acidic water rests, it melts the rubber bladder in storage, which is quite harmful. But with this filter, you get non-acidic water.

7-Stage Filtration

Filtration in seven stages helps purify and enhance the water while removing pharmaceuticals, TDS, microplastics, fluoride, lead, and 1000+ other contaminants.

Innovative Design

The design eliminates the most caused problems in the RO system like acidic water, short filter life, slow flow rate, canister filter housing leaks, etc. I mean, what is the thing this filter cannot do?


  • Twice artesian remineralization.
  • It has a dedicated sediment filter.
  • Catalytic carbon.
  • 0001-micron Dow membrane.


  • Wastes 4 gallons in per gallon purification.


#5. Express Water Reverse Osmosis Water Filtration System

I mean, RO systems are quite expensive, and it’s harder to afford. So that is why I included this Express Water RO Filtration system that is very affordable and will give you water that is perfect for hydroponics.

Under Sink Filter

There is always a mess while activating and refilling the water filter. But in this under sink filtration system, the water filter activates itself automatically and fills your water tank with nutrient-balanced water.

Leak Detection

Each undersink filter in the RO system has an emergency leak detection technology. It can stop the water flow as soon as it has detected a leak and will prevent all the unwanted moisture.


The water filters from Express Water are always fully customizable and upgradeable from the bottom to the top. You will find quick connection fittings with additional filtration attachments such as deionization water filter, Alkaline Water Filter, UV water filter, and many more.

Save Your Time

Changing the filters like Granular Activated Carbon, Carbon Block, Sediment filters are so quick and easy, and you only have to change them twice a year. And the other filters like Alkaline, Post-Carbon, and RO membrane need to be changed only once a year.

Double Sealed Filter

The double filters preserve your whole RO system and give you the best filtration value and efficiency.


  • 5 stages of purification.
  • Quick Connect and Brass Feed adapter are included.
  • A labeled color-matched system to give you an idea of what’s going on.
  • On-demand support.


  • Doesn’t have any automatic shut-off.


#6. iSpring Commercial Tankless RO System

We have already written about a filtration system from this manufacturer, but this one is a bit different. A RO system meant for high-demand applications with a tankless design.

Powerful Booster Pump

Get maximized RO water production with the pre-installed booster pump of high power. It increases water pressure and pushes to the dual-flow membrane. As a result, you get twice the amount of water that a traditional system.

Dual-Flow Membrane

This membrane pulls in water from two sides and offers you a fantastic drain ratio of 1: 1. So there is less water wastage and no direct impact on the environment.

Tankless System

Both the booster pump and dual-flow membrane come together to give you filtered water with all the nutrients present in it on demand. So, it reduces the need of a storage tank and saves you a lot of space.


You can use this filter in so many places starting from home to meet the daily demand of purified drinking water, at the office to keep all the workers hydrated with safe water, and even in restaurants to make food with purified water to avoid the distinct taste.

Works with Low-Pressure

Most RO systems stop working if there is a water pressure less than 45 psi. But with this filter, you can get purified water with water pressure as low as 25 psi for the RCS5T.


  • It comes with extra filters to replace.
  • Great capacity of 500 gallons.
  • High-efficiency booster pump.
  • A silver chrome drinking water faucet is included.


  • Very hard to install.


#7. LiquaGen Portable Reverse Osmosis Water Filter System 6 stage

This is a 2-in1 RO system for dual usage with 6 stages of filtration. You will fall in love with all the features it has. Let’s discuss them in detail.


You will not have to spend money on two filtration systems when you can have both of them in one. This system has two outlets meant for two different uses. The first outlet gives you filtered water for drinking and other household usages. And the other one gives you fresh water for hydroponics, laboratory, aquariums and other premises where clean water is needed.

Restores Minerals

While filtering, many traditional filters destroy the vital nutrients present in water. This filter helps restore all the lost minerals (potassium, Sodium, Magnesium, Calcium, and many others) and improves the overall water quality.

Manual Flash Valve

The system is greater than any other ones in the market. The manual flush valve increases the life cycle, reduces any possible leaks, and saves valuable time if you flush the system on your own every few months.

Easy to Install

The filter comes pre-assembled, so you don’t have to spend hours behind installing it. Just do some quick connections, and your system is ready within less than 10 minutes. So easy, right?

Quick Filtration

You won’t need to sit tight for clean water. The inner siphon assists with having the system a quicker water stream which is normally 400 gallons each day. This channel can fill a cup rapidly in under 12 seconds.


  • Comes pre-assembled.
  • Two outlets for double usage.
  • Restores all the lost minerals.
  • Very easy to install.


  • There is no shut-off valve.


#8. Pure Blue H2O 5 Pack Annual Replacement Filters for Four-Stage Reverse Osmosis Water Filtration System

We have talked a lot about filtration systems only. But now, let’s talk about replacement filters. Let’s be honest here. No matter how good the filter system you buy, you have to change the filters every once.

Reduces Contaminants

This pack of 5 replaceable filters includes 1 stage post-carbon block filter, 2 stage pre-carbon block filters, and 2 stage sediment filters. All of them do an excellent job reducing the contaminants.


You won’t have to do hard work while replacing the filters. With a simple twist-lock manifold in the filters, everything is sanitary and simple.

GPD Membrane Filter

It reduces the total dissolved solids and other harmful tap water contaminants. It can filter up to 1/10000 of a micron-sized substance.

Protects Membranes

We all know how smaller particles of dirt destroy the membranes of the system. The stage one sediment filter filters all the dirt and improves the clarity of water overall.


  • Reduces odor and chlorine taste.
  • Increases the clarity of the water.
  • Protects thin film membrane.
  • Easy to install and maintain overall.


  • It is a bit pricey.


Things To Consider Before Choosing Hydroponics Reverse Osmosis System

It is not rocket science to understand how vital purified water is for our lives. Even when it comes to growing hydroponics, purified water is a must. But, according to research, buying a RO system saves you a lot of money instead of buying bottles and containers of purified water. So, I want you to invest your money in the right RO system.

To buy a RO system, first, you have to understand how many types of systems are there. Usually, there are two types. They are Countertop Reverse Osmosis System and Undercounter Reverse Osmosis System.

Countertop RO system

As their name suggests, they sit over a countertop or any other surface or on the ground. Technically they should be called Freestanding RO. They can sit anywhere, are very compact and lightweight, and won’t even take much space. These systems are for the ones who change their home very often to carry it with them.

Undercounter RO System

If I am naming these more accurately, they will be named Undersink RO System. These are the most common ones and are very easy to use after you are done with the installation. Just turn on the faucet and that’s it. They can fill a lot of water and are more convenient for everyday use.

Once you have the idea of the types of RO systems and decide which one you will go for, there are a few features needed for a good RO system. They are:


It doesn’t matter if you buy the Countertop or Undercounter RO system. The size will be the first and foremost thing to consider. If you have a tight space in your kitchen already (or the place where you plan to install it), then buying a big system will cause a lot of inconvenience for you. So, look out for systems that are compact and space saver.

Volume of Water

There is a limit to every RO system of how much water it can filter per day. The common limits are 50 gallons, 100 gallons, and 150 gallons. If you have a small household, then 50 gallons should work for you. Remember that the more usage, the more need.


To purify water, the RO system uses several filters to refine them. The four-stage filters are the most common ones. Starting with systems, you won’t need a system with a lot of filters. But if you live in an area with very much polluted water, you should look out for a system with 5-6 filters.


It is no secret that RO systems wastewater during purification. But nowadays, with advanced technologies, manufacturers have created systems that waste less water by repurposing it to your other usages like laundries or dishwashing, etc.

How Do Reverse Osmosis Water Purifiers Work?

The reverse osmosis water purifiers work by removing harmful contaminants and substances from water by using pressure to force the water molecule. While forcing the molecules, it goes through a semipermeable membrane that filters out contaminants separates ions, and flushes them away. There are four stages of this filtration. They are:

Sediment Filter

This is a pre-filter stage. It strains out dirt, silt, and sediment. It is very important as this filter from dirt gets inside the delicate membranes of RO. Or else it would be destroyed within a few days.

Carbon Filter

It is designed to remove contaminants like chlorine and other alike that affect the life-cycle and performance of the RO filter. This filter improves the overall taste and odor of your water.

Reverse Osmosis Membrane

The membrane is a semipermeable RO membrane in the water purification system designed to allow the water molecules through but leaving behind all the additional contaminants.

Polishing filter

There is a final post filter known as the “polishing filter,” and you can already tell that it polishes by the name. The filter will polish the water by removing any remaining odor or a bad taste in the water. This filter ensures your water is the best of all.

There are also systems with more filters that give you more clean water. But usually, that is not needed if you live in a normal area.

Here are some factors to keep in mind that affect the water purification system. Because if you know how these filters work, you should know what influences them to give them a long-life cycle.

  • Low water pressure hinders the system from working properly. General city taps have a pressure of 40-85 psi, but the system won’t operate if it is less than that.
  • It takes long enough to filter cold water as the contaminations are hard to filter out.
  • The more contaminants in the water, the quicker the filter will stop working.

Why Reverse Osmosis for Hydroponics?

Using Reverse Osmosis (widely known as RO) has become a widespread practice in hydroponics for creating hydroponic nutrient solutions. But the question is, why RO? First, we will discuss the advantages and disadvantages of this system.


The idea of using filtered water by RO system is to have the good enough “base” that is usually used to make balanced nutrient solutions. If the water you use has contaminants within, you will have very low control over your composition. Your results will suffer as well.

For example, if the nutrients add 150 ppm of calcium but your tap water already had 30-50 ppm, then adding more calcium will place you within the optimal spot. And suppose the tap water contains too many fluorides, sodium, and carbonates. In that case, it won’t be good to use that water in the hydroponic crop. The water will pretty much destroy the crops. So that’s why using RO is very important for hydroponics.


There are two main problems with this. The first one is that this RO process is very intensive and costs a lot of energy, which will cost you pretty well. The second problem has a direct impact on our environment that includes the waste of RO filters.

However, keeping all the negatives aside, the use of RO water is very unavoidable. Because if your water has too many harmful ions and substances, then your hydroponics crops will die in no time. That is why it is safer to remove all ions and contaminants (both good and bad ones) and later on add the good ones again to have a successful field of hydroponics crops.


What Contaminants Are Removed in Reverse Osmosis?

The most common contaminants that Reverse Osmosis are metal ions. Such as Leas, chromium, copper, chloride, and sodium. Some systems effectively remove phosphorus, nitrate, calcium, radium, arsenic, fluoride, and many more.

What is a good ppm for Reverse Osmosis Water?

The ideal level is 300-500 ppm. Lower than this lacks minerals, and higher than this is not recommended to drink water from.

What is the pH of Reverse Osmosis Water?

RO system always provides the best tasting and highest quality drinking water. And the pH usually ranges from 5-7, which is very healthy.

Is Reverse Osmosis Healthy for Me Too?

Yes, most certainly. Reverse Osmosis removes every particle of dirt, debris, and contaminations present in your water. It makes the water healthy enough for you to drink.

Do you need a reverse osmosis system with a water softener?

There is usually no need for that. But water softener makes the water from reverse osmosis last longer in the tank and hinders them from turning acidic. So, if you buy one, it is a win-win for you.

Can I use reverse osmosis water instead of distilled?

Yes, and you should. Water from RO is devoid of any type of volatile chemicals and very much filtered than distilled water.

Is Reverse Osmosis Water Safe to Drink?

Yes, without a doubt. According to WHO, reverse osmosis water is the safest drinking water you’ll ever find.

Final Words

We have selected these top 8 Reverse Osmosis Water for you to drink the safest water and grow hydroponics crops. These are the best RO systems under budget that customers always have been satisfied with.

We have tried our best to give you every specification of each system, along with the pros and cons.

Finding a sound RO system might be challenging. Still, we hope we have made the job easy to incorporate all these exceptional systems into the list. Let us know if you produce some super impressive hydroponics crops with one of these.