Build Your Aquarium/Hydroponics RO DI Reverse Osmosis System
Customized Product – Please Review Before Ordering: Build Your Own RO/DI systems are assembled according to the options selected during checkout. Once assembly has started, the order cannot be cancelled or changed.
These systems are intended for experienced aquarium, hydroponic, laboratory, and specialty-water users. If you are unsure which membrane, DI configuration, valve, pump, meter, or storage option you require, please contact us before completing your order.
Build Your Own Aquarium and Hydroponics RO/DI System
Create a customized reverse osmosis and deionization system for your aquarium, reef tank, hydroponic garden, laboratory equipment, or other low-TDS water application.
The base configuration includes the system shown in the product image, three pre-filters, and one refillable DI stage. You can customize the system by selecting the membrane capacity and adding optional filtration stages, meters, valves, pumps, gauges, storage components, or additional outlet lines.
Base Configuration: The starting price includes three pre-filter stages and one DI filter. The final price changes according to the membrane, accessories, and upgrades selected during checkout.
Choosing the Right RO/DI Configuration
The correct configuration depends on your source-water TDS, incoming pressure, required daily production, storage method, and desired product-water quality.
- Select a membrane capacity that matches your required daily water production.
- Add a booster pump when feed pressure is too low for the selected membrane.
- Add a TDS meter to monitor membrane and DI-filter performance.
- Add a float valve when filling an open aquarium or hydroponic storage container.
- Add a pressurized tank and faucet when purified water must be stored for drinking or on-demand use.
- Add a second DI stage when additional resin capacity or final polishing is required.
Dual DI Recommendation: Many reef-aquarium and specialty-water users add a second mixed-bed DI filter, Part No. 104050 , to increase total resin capacity and provide an additional polishing stage.
The base system already includes one DI filter. Select the additional DI option only when a second DI stage is required.
Optional Parts and Accessories
Dual Inline TDS Meter – Part No. 105766
The dual inline TDS meter measures water quality at two points in the system.
It can be installed to compare feed water with RO water, or RO water with final DI water. This makes it easier to monitor membrane rejection and determine when the DI resin is becoming exhausted.
Float Valve – Part No. 105366
The aquarium float valve automatically controls the water level inside an open storage container, reservoir, aquarium sump, or hydroponic tank.
When the water reaches the selected level, the float valve closes the product-water line. When properly combined with compatible system controls, it helps reduce the risk of accidental overflow.
Important: A float valve controls the product-water outlet but does not always shut down the entire RO system by itself. Confirm that your configuration includes the required automatic shut-off valve, pump switch, or solenoid control.
Inline Quick Ball Valve – Part No. 105120
The inline ball valve provides simple manual on-and-off control of the purified-water line.
It is useful when operating the system without a faucet or float valve, or when adding a separate outlet for aquarium, hydroponic, laboratory, or equipment use.
Feed-Pressure Gauge – Part No. 105246
The pressure gauge monitors feed-water pressure entering the RO membrane.
A gradual pressure drop may indicate that the sediment or carbon pre-filters are becoming restricted and may require replacement.
Manual Membrane Flush Kit – Part No. 105126
The manual flush kit temporarily increases flow across the membrane's drain side to help rinse away accumulated dissolved solids.
Regular flushing may help support membrane performance and service life. Systems using a 200 GPD membrane require a different flow-control and flush configuration.
Optional Pressurized Storage Tank
Select a pressurized tank when you need purified water stored and available on demand. A pressure tank is commonly used with a drinking-water faucet, refrigerator connection, ice maker, or other intermittent-use outlet.
Open aquarium and hydroponic storage containers normally use a float valve instead of a pressurized RO tank.
Optional Drinking-Water Faucet and Dual-Outlet Upgrade
Select a faucet when the system will also supply drinking water. In a standard series configuration, RO water passes through the selected post-carbon filter before reaching the faucet.
The dual-outlet upgrade creates two separate product-water lines:
- A drinking-water line routed through the inline post-carbon filter and connected to the faucet.
- A separate DI-water line for aquarium, hydroponic, laboratory, or specialty-water use.
The DI outlet can be controlled manually with an inline ball valve or automatically with a compatible float valve and shut-off configuration.
Optional Booster Pump Kit
The optional booster-pump package may include:
The correct pump must be matched to the selected membrane capacity. Additional controls may be required depending on whether the system fills a pressure tank, open reservoir, or float-controlled container.
Two-Way Faucet Diverter Valve – Part No. 105243
The faucet diverter valve allows the system to connect temporarily to a compatible sink faucet.
When this option is selected, the drain line can be routed back to the sink through the diverter arrangement. Confirm faucet compatibility before selecting this installation method.
Higher-Capacity Membranes: For configurations rated at 150 GPD or higher, a properly sized booster pump is strongly recommended to help the membrane operate near its rated capacity.
System Specifications
| Specification | Details |
|---|---|
| System Type | Customizable RO/DI water filtration system |
| Standard Base Configuration | Three pre-filters and one refillable DI stage |
| Available Membrane Capacities | Approximately 50–200 GPD, depending on selection |
| Expected Final DI Water | May reach approximately 0 ppm TDS when the membrane, DI resin, pressure, and feed-water conditions are suitable |
| Approximate Product-to-Drain Ratio | Approximately 1:2 to 1:2.5, depending on configuration |
| Approximate System Dimensions | 15 in. L × 6 in. D × 15.5–17 in. H |
| Approximate Starting Weight | Approximately 16 lb.; final weight varies by selected components |
| Operating-Water Temperature | 40–104°F |
| Recommended Feed Pressure | 45–75 PSI |
| Primary Applications | Reef aquariums, freshwater aquariums, hydroponics, laboratory support, dental equipment, drinking water, coffee and tea, food preparation, and other low-TDS water applications |
Low Feed Pressure: If incoming pressure is below 45 PSI, add a correctly sized booster pump and compatible shut-off controls.
High Feed Pressure: If incoming pressure exceeds 75 PSI, install a pressure regulator and adjust the feed pressure to approximately 60–65 PSI.
Water-Safety Warning: This system is intended for use with a microbiologically safe water supply. Do not use it as the only treatment for water of unknown biological quality without appropriate testing, pretreatment, or disinfection.
TDS = Total Dissolved Solids.
Filter and DI Resin Maintenance
- Replace sediment and carbon pre-filters according to pressure loss, water quality, usage, and visual condition.
- Monitor RO membrane performance by comparing feed-water and RO-water TDS.
- Replace DI resin when final-water TDS begins to rise above the level required for your application.
- Systems producing aquarium or reef water should be monitored regularly because exhausted DI resin can release previously captured ions.
- The original estimate of approximately 1,000 gallons per filter set is only a general guideline. Actual filter and resin life may be significantly shorter or longer.
Performance Notice: Membrane production, TDS reduction, DI-water purity, drain ratio, and filter life depend on feed-water TDS, pressure, temperature, membrane type, pre-filter condition, DI-resin capacity, system design, and water usage. A DI stage may produce approximately 0 ppm TDS, but this result cannot be guaranteed under every operating condition.
Installation fittings and instructions are included according to the system configuration selected during checkout. Optional accessories that are not selected are not included.
Filter Replacement Options and Alternatives for Item Number:101000
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