Best RO/DI Units For Aquariums

The water within your aquarium is arguably the most important factor in creating a successful system. Whether you are building a vibrant saltwater reef, a beautiful planted aquarium, or a simple fish only tank, producing reverse osmosis deionized water will give you the foundation needed for a happy and healthy system.  Within this article we are going to discuss some of the best RO/DI units that can be the perfect fit for your aquarium. We unfortunately will not be able to discuss all of the RO/DI systems that may be a good fit for your system but, if you have any questions or are searching for a recommendation, our customer care team would be happy to assist you. 

We will start this discussion by looking at an RO/DI unit that can squeeze into tight spaces and one that is a great choice for a budget build. Then, we will break down one filter that is our best seller and another one that maximizes performance. Finally, we will discuss an RO/DI unit that can create the large amounts of water you may need for your big system.

Summary:

RO/DI for the apartment or tight spaces: Aquatic Life Twist-In 100 GPD 4 Stage RO/DI System

High quality water on a budget: Marine Depot KleanWater 4-Stage Economy 100 GPD RO/DI Unit

Our overall best-seller: Marine Depot KleanWater 4-Stage Advanced 100 GPD RO/DI Unit

Maximizing performance: SpectraPure MaxCap Performance Plus Ultra Low Waste Water RO/DI Unit

The most gallons per day: AquaFX Octopus 200 GPD RO/DI System With Chloramine Blaster Upgrade

RO/DI for the apartment or tight spaces: Aquatic Life Twist-In 100 GPD 4 Stage RO/DI System

Aquatic Life Twist-In RO/DI Unit
Aquatic Life Twist-In RO/DI Unit

One of the main reasons why some hobbyists choose to purchase their water from a local fish store as opposed to making it themselves is simply that they lack space. For those living in an apartment, the Aquatic Life Twist-In 100 GPD RO/DI unit is perfect for your lifestyle. The entire system can fit in a backpack and it can be mounted underneath your sink. Additionally, this unit can either be connected to a sink faucet via the included adapter or, it can be plumbed into your drain. Aquatic Life also makes it very easy to replace each filtration cartridge by twisting it, pulling it out and swapping in a new one. Another great feature of this system is that despite its small size, it is rated for production of up to 100 gallons per day. As far as how often you need to replace the filter cartridges and membrane, it will depend on the quality of water entering your system and how frequently you are using it. Each of these features in combination make the Aquatic Life Twist-In 100 GPD system one of the best RO/DI units for the space lacking hobbyists. 

High quality water on a budget: Marine Depot KleanWater 4-Stage Economy 100 GPD RO/DI Unit

For those looking to invest in a budget friendly RO/DI unit, look no further than the KleanWater 4-Stage Economy 100 GPD RO/DI System from your friends at Marine Depot. This is more of a standard sized RO/DI unit made with extremely high quality parts. Besides its price, this unit does offer some really nice features. One of them is that all of the parts needed to get started including the filters, tubing, and the faucet adapter are already included. This system also allows you to upgrade it as you go with monitoring devices such as TDS meters and pressure gages. Another excellent part of this unit is that by purchasing it, you will receive a discount of 15 percent on all replacement filters purchased for the life of your system. A one year warranty is also included with the purchase of the KleanWater and we are well versed on how to troubleshoot any possible issues you may experience. All of these features culminate in a system that is one of the best RO/DI units for hobbyists on a budget.

Marine Depot Kleanwater Economy RO/DI Unit
Marine Depot Kleanwater Economy RO/DI Unit

Our overall best-seller: Marine Depot KleanWater 4-Stage Advanced 100 GPD RO/DI Unit

Marine Depot KleanWater Advanced RO/DI Unit
Marine Depot KleanWater Advanced RO/DI Unit

The next step up from the KleanWater Economy in our line of RO/DI units is the KleanWater Advanced. While the basic form and materials of the systems are the same, the Advanced model has more premium features that make it more efficient and user friendly. The first of these upgrades is a pressure gauge. This part allows you to monitor the pressure entering your system and it will also help you calculate the amount of water you can expect the unit to make daily. Another premium feature of the advanced model is a TDS monitor that allows you to see the total dissolved solids at different points in the filtration process. The TDS meter will also alert you to when the filters and membrane within the system need to be replaced. The final premium feature of the advanced model is the included flush valve. This valve allows you to “flush” your RO/DI system of all water after each use and this will preserve the life of your filters and membrane. All of these features make the Marine Depot KleanWater Advanced our pick for one of our overall best RO/DI Units.

Maximizing performance: SpectraPure MaxCap Performance Plus Ultra Low Waste Water RO/DI Unit

For those looking to maximize their water output while also minimizing waste water, the MaxCap Performance Plus Ultra Low Waste Unit from SpectraPure will suit your needs. This unit focuses specifically on limiting the waste water coming out of your system. This not only will help you save on your water bill but, it is also much better for the environment. This system also features a booster pump that will increase the amount of water you can produce to around 100 gallons per day. Spectrapure also has a variety of TDS monitors and pressure gauges on this system to keep you informed on its performance. You can expect a ratio of one gallon of usable water to one gallon of wastewater which is a massive improvement over the usual one to three plus gallon ratio that is standard for most systems. Each of these features make the SpectraPure MaxCap Performance Plus Ultra Low Waste Water our choice for one of the best RO/DI units that maximize efficiency and performance. 

SpectraPure MaxCap Performance Plus RO/DI Unit
SpectraPure MaxCap Performance Plus RO/DI Unit

The most gallons per day: AquaFX Octopus 200 GPD RO/DI System With Chloramine Blaster Upgrade

AquaFX Octopus 200 GPD RO/DI Unit
AquaFX Octopus 200 GPD RO/DI Unit

Our final featured RO/DI unit within this article is the best choice for those needing to make some serious water. The AquaFX Octopus 200 gallon per day unit will allow hobbyists to create the water they need to perform changes and top-off on even the largest of aquariums. In addition to its high output of around 200 gallons per day, this unit also has some excellent features. One of these features is a microprocessor within the unit that helps maximize its efficiency and limits its waste water. Another premium feature of this unit is that it  has the ability to flush itself after each use to help preserve the life of your membrane and filters. Additionally, this system has a pressure regulating pump with high and low pressure kill switches that ensure the unit is at peak operation. For its incredible automation and high output, the AquaFX Octopus 200 GPD system is our pick for one of the best RO/DI units for maximum water creation.

Final Thoughts:

We hope this article has given you some helpful information on RO/DI units and how they can be a great investment in your aquarium hobby adventure. Investing in the quality of your aquarium water is a great step to take towards having a successful system. Water quality is the most important factor in determining overall fish health. Starting off your tank and topping off with TDS free RO/DI water will ensure that no harmful nutrients make it into your system through your original water source. If you have any remaining questions or, you are needing a recommendation, our customer care team would be happy to assist you.