Max Water Deionization RO/DI marine aquariums & reeftanks Reverse Osmosis System 0 ppm
6-Stage 100 GPD Saltwater Aquarium RO/DI System
Produce high-purity water for reef aquariums, saltwater aquariums, hydroponics, laboratory support, and other low-TDS applications with this 6-stage 100 GPD reverse osmosis and deionization system.
The system combines sediment filtration, two carbon pre-filtration stages, a 100 GPD reverse osmosis membrane, a refillable mixed-bed DI filter, and a final coconut-shell carbon polishing filter.
The RO membrane removes most dissolved solids before the water reaches the DI stage. The refillable DI cartridge then removes remaining dissolved ions and may produce approximately 0 ppm TDS water when the membrane, resin, pressure, and feed-water conditions are suitable.
Ideal for Aquarium and Specialty-Water Applications: The DI stage provides additional polishing after the RO membrane, helping produce the low-mineral water required for reef aquariums, saltwater mixing, hydroponics, and other sensitive applications.
Storage Tank and Drinking-Water Faucet Not Included: This system is primarily designed for direct filling of an aquarium reservoir, storage container, or hydroponic tank. A pressurized storage tank and drinking-water faucet are not included unless selected separately.
Key Benefits
- 100 GPD membrane provides higher daily production than standard 50 GPD systems
- Designed for reef aquariums, saltwater tanks, and hydroponic use
- May produce approximately 0 ppm TDS with fresh DI resin
- Refillable DI cartridge helps reduce long-term replacement costs
- Helps reduce sediment, chlorine, dissolved solids, tastes, and odours
- Compact design for wall-mounted or equipment-room installation
- Multiple optional accessories may be added during checkout
Six Stages of Filtration
- Stage 1: 1-micron polypropylene sediment filter Part No. 104001
- Stage 2: Granular activated carbon filter Part No. 104004
- Stage 3: 5-micron carbon block filter Part No. 104005
- Stage 4: 100 GPD thin-film composite RO membrane Part No. 104094
- Stage 5: Refillable mixed-bed DI filter Part No. 104050
- Stage 6: Inline T33 coconut-shell GAC post-carbon filter Part No. 104041
The refillable DI cartridge can be refilled using Max Water bulk mixed-bed DI resin: Part No. 104135-5 .
Important Flushing Instruction: Always bypass the DI stage when flushing a new RO membrane or after replacing the sediment and carbon filters.
Initial flush water may contain membrane preservatives, carbon fines, or elevated TDS that can prematurely exhaust the DI resin.
How the Filtration Process Works
Pre-Filtration Stages
The sediment and carbon filters help protect the RO membrane by reducing dirt, rust, suspended particles, chlorine, tastes, and odours.
Reverse Osmosis Stage
The 100 GPD RO membrane reduces most dissolved solids before the water reaches the DI cartridge. Membrane performance depends heavily on feed pressure, temperature, TDS, and membrane condition.
Deionization Stage
The refillable mixed-bed DI filter removes remaining dissolved ions after the RO membrane. Fresh DI resin may reduce the final product water to approximately 0 ppm TDS under suitable operating conditions.
Final Carbon Polishing Stage
The final inline coconut-shell carbon filter improves taste and freshness. For aquarium-only applications, some users may choose to bypass the post-carbon stage and collect water directly after the DI filter.
Helps Reduce
- Sediment, dirt, rust, and suspended particles
- Chlorine taste and odour
- Unpleasant tastes and smells
- TDS = Total Dissolved Solids.
- Fluoride
- Lead, copper, and certain dissolved metals
- Remaining dissolved ions through the DI stage
Actual contaminant reduction depends on feed-water chemistry, pressure, temperature, membrane performance, pre-filter condition, DI-resin condition, and overall system configuration.
Included Components
- 6-stage reverse osmosis and deionization unit
- 100 GPD RO membrane, Part No. 104094
- One complete set of installed pre-filters
- Refillable mixed-bed DI cartridge
- Inline coconut-shell post-carbon filter
- Filter-housing wrench
- Standard installation accessory pack
- Installation fittings and tubing
- Optional booster pump, when selected; additional cost applies
Configuration Notice: A storage tank, faucet, float valve, pressure gauge, TDS meter, booster pump, automatic shut-off valve, and other accessories are included only when specifically selected during checkout.
System Specifications
| Specification | Details |
|---|---|
| System Type | 6-stage reverse osmosis and deionization system |
| RO Membrane Capacity | 100 GPD |
| Expected Final-Water TDS | May reach approximately 0 ppm with fresh DI resin and suitable operating conditions |
| Approximate RO Membrane TDS Reduction | Approximately 95%–97%, depending on conditions |
| Final DI Conductivity | May be below 0.1 µS/cm with fresh resin and suitable conditions |
| Final DI Resistivity | May approach 18 MO·cm under ideal operating conditions |
| Approximate Product-to-Drain Ratio | Approximately 1:2 |
| RO Unit Dimensions | 15 in. L × 6 in. D × 17 in. H |
| Approximate Total Weight | 16 lb. |
| Operating-Water Temperature | 40–104°F, maximum 40°C |
| Recommended Operating Pressure | 45–75 PSI |
Low-Pressure Installation: If incoming water pressure is below 45 PSI, add a correctly sized booster pump and compatible high-pressure shut-off switch.
High-Pressure Installation: If incoming pressure exceeds 75 PSI, install a pressure regulator and adjust the 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 every 6–12 months under normal residential conditions, or sooner if feed pressure drops.
- Monitor RO-water TDS to evaluate membrane performance.
- Replace or refill the DI cartridge when final-water TDS begins to rise.
- Keep the refillable DI cartridge tightly packed to reduce channeling.
- Always bypass the DI stage when flushing new filters or a new membrane.
Performance Notice: Final-water TDS, conductivity, resistivity, membrane output, drain ratio, DI-resin life, and filter life are approximate. Results vary according to feed-water TDS, pressure, temperature, membrane condition, DI-resin quality, resin packing, water usage, and overall system configuration.
Filter Replacement Options and Alternatives for Item Number:101047
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