The Eliminator 6 RO/DI is our top-end aquarium system: dual 150 GPD membranes for 300 GPD total output, plus a 2-stage DI section running MaxCap roughing DI followed by SilicaBuster finishing DI. That dual-DI pairing keeps you at 0 TDS for far longer than a single mixed bed. Built and tested in Tempe, AZ.
Features
- Dual SpectraPure 150 GPD RO membranes — 300 GPD total, 98% stabilized rejection
- 1 micron sediment pre-filter
- Dual 1 micron carbon block pre-filters
- 2-stage DI: MaxCap roughing (position 1) + SilicaBuster finishing (position 2) — far longer DI life than a single mixed bed
- Manual flush valve extends membrane life and prevents TDS creep
- Automatic inline shut-off valve for unattended production
- Float valve for reservoir-based production
- 3 clear filter housings + double O-ring DI housings
- HM Digital DM-1 TDS meter for continuous monitoring
- Pressure gauge, no-rust mounting bracket, housing wrench, garden hose adapter
Specs
- Production: 300 GPD (dual 150 GPD membranes) at standard conditions
- Waste ratio: 3:1 on hard water, 2:1 on soft water
- Stages: sediment → dual carbon → dual RO membrane → MaxCap DI → SilicaBuster DI
- Tubing: 6 ft feed, 6 ft product, 6 ft waste
- Warranty: 1 year
Related products
- Replacement cartridges: MaxCap High-Capacity Cartridge Kit with ZetaZorb
- Smaller capacity single-DI version: Eliminator 4 RO/DI 90/150 GPD
- Upgrade to 1:1 waste ratio: MaxCap 1:1 UHE 100 GPD · 200 GPD
- Add a roughing DI cartridge: Mega MaxCap DI Cartridge 10"
- Pre-treat chloramines: Eliminator Dechlor 2-Stage Pre-Filter
- Browse all aquarium RO systems
Questions about filters, production rates, or membranes? Visit our Know Your Filters page or contact us.
Cleaner water for plants, pets, and people
Reverse osmosis membranes reject microplastics, PFAS and "forever chemicals," chlorine and chloramine byproducts, heavy metals, and the dissolved solids that show up as taste and scale. That means cleaner feed water for your plants, animals, business, or family — and a lot less reliance on bottled water, which keeps plastic out of the landfill. Most setups run a 3:1 waste-to-product ratio on hard water and 2:1 on soft water, and can be tuned to 1:1 in high-purity feed areas or with a periodic pure-water flush. The system is built to last with field-serviceable filter housings, so you replace cartridges (not whole units) for years of dependable purity.
Note: DI water is not intended for drinking. DI resin is not made from food-grade material.