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Fish Tank Supplies > Fish Tank Water Purification > RO/DI Water Filters

Reverse Osmosis Filters, Deionizers & Aquarium Tap Water Filters


Reverse osmosis filters, deionizers, combination RO/DI units & other tap water filters purify tap water for drinking and aquarium use (avoid distilled water). These filters soften hard water for lowered pH without additives, and they remove contaminants - you won't need chlorine removers or water conditioners. If you're concerned about water quality, reverse osmosis systems, deionizers and other tap water filters clear it up from the start! Scroll down to see all.

You will need proper aeration, vitamins & supplements and/or salt to replace oxygen and trace elements removed by purification - but you should be using all that anyway!

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Reverse Osmosis Filters






Water Deionizers






Reverse Osmosis & Deionizer Parts & Accessories





Shop by Featured Products

MaxPure RO/DI System - 60 GPD (Spectrapure)
Regular Price: $181.94





MaxPure RO/DI System - 90 GPD (Spectrapure)
Regular Price: $182.63





Pure-Flo II RO Unit - 50 GPD TFC - 2 Canister(ESU)
Regular Price: $127.63





Pure-Flo II RO Unit - 50 GPD TFC - 3 Canister(ESU)
Regular Price: $209.72





Pure-Flo II RO w/Pump-100 GPD TFC-3 Canister (ESU)
Regular Price: $260.83





High Silicate Removal Deion Cartridge (Kent)
Regular Price: $40.59





Pure-Flo II Add-On Deionization Canister (ESU)
Regular Price: $48.79





Pinnacle + RO - 200 gpd
Regular Price: $445.74





Pinnacle RO - 35 gpd
Regular Price: $290.72





Pinnacle + RO - 100 gpd
Regular Price: $501.63





Replacement Encapsulated Membrane - 90 gpd
Regular Price: $74.80





AquaticLife RO System Membrane - 100 gpd
Regular Price: $53.78





Sediment Cartridge - 1 micron
Regular Price: $7.45





Carbon Block Cartridge
Regular Price: $20.37





RO Membrane - 35 gph
Regular Price: $112.06





RO Membrane - 50 gph
Regular Price: $148.59





RO Membrane - 100 gph
Regular Price: $167.76





DI Cartridge
Regular Price: $43.68





Clear Canister with Lid
Regular Price: $25.67





RO Membrane Housing Clip - 1 pk
Regular Price: $2.40





Pressure Gauge
Regular Price: $21.91





Auto Shut Off Valve
Regular Price: $24.99





1/4 in. QF Tee
Regular Price: $7.25





1/4 in. QF Check Valve
Regular Price: $18.27





1/4 in. QF to 1/8 in. MPT Elbow
Regular Price: $7.25





1/4 in. QF to 1/4 in. MPT Elbow
Regular Price: $5.49





Aluminum Mounting Bracket for 2 Canisters
Regular Price: $50.21





Aluminum Mounting Bracket for 3 Canisters
Regular Price: $50.21





Pinnacle Canister Wrench
Regular Price: $8.21





SpectraPure Carbon Block Filter Cartridge - 1 Micron - 10 in.
Regular Price: $11.10





Micro-Tec Sediment Filter Cartridge - 1 Micron - 10 in.
Regular Price: $8.45





AquaticLife RO System Pre-Filter Cartridge - 1 Micron
Regular Price: $4.04





AquaticLife RO System Pre-Filter Cartridge - Solid Carbon Block - 5 Micron
Regular Price: $7.10





AquaticLife RO System Mixed Bed Resin Cartridge
Regular Price: $19.28





MaxPure RO System - 90 gpd
Regular Price: $162.37





Tap Water Filter (Aquarium Pharmaceuticals)
Regular Price: $53.36





Tap Water Purifier Replace Cartridge
Regular Price: $19.28





HM Digital DM-1 Dual TDS Meter (Spectrapure)
Regular Price: $31.91




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