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RO/DI Components

At AquaCave, we offer some of the best selection and best prices on High-Efficiency RO/DI reverse osmosis units, replacement membranes, cartridges, fittings, tubing, TDS meters, Booster pumps, and accessories for your marine, reef, and freshwater aquarium.
Reverse Osmosis RO systems remove impurities from your aquarium water such as chlorine, chloramines, pesticides, phosphates, heavy metals, and many others. 

60 of 87 Items
  • Case (20 x 1.25 lbs.) DI Resin, Mixed Bed Color Changing Case (20 x 1.25 lbs.) DI Resin, Mixed Bed Color Changing Case (20 x 1.25 lbs.) DI Resin, Mixed Bed Color Changing

    AquaCave

    Case (20 x 1.25 lbs.) DI Resin, Mixed Bed Color Changing

    Case (20 x 1.25 lbs.) DI Resin, Mixed Bed Color Changing  ResinTech MBD-30 is a one-to-one volume mixture of CG8-H (a hydrogen form amber colored strong acid cation resin) and SBG1-OH-ID (a blue colored hydroxide form type 1 strong base anion resin)...

    Was: $269.95
    Now: $229.46
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  • Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC

    Milwaukee Instruments

    Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC

    Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC DESCRIPTION This Milwaukee 3-in-1 combo meter allows you to measure pH, EC (conductivity) and TDS with a single meter and one single probe. WHAT PEOPLE ARE SAYING "Superb meter, easy to use,...

    $209.55
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  • AQUATECH 8800 RO Booster pump Kit AQUATECH 8800 RO Booster pump Kit AQUATECH 8800 RO Booster pump Kit

    AQUAFx

    AQUATECH 8800 RO Booster pump Kit

    AQUATECH 8800 RO Booster pump Assembly.Includes: * AquaTech 8800 booster pump, Model No: B851-2J03-B423 * Power transformer  * 40 psi pressure switch * 2 x 3/8" x 1/4" Jaco Reducers AQUATECH 8800 RO Booster pump Assembly.**** PRODUCT MANUAL...

    $149.95
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  • Complete Drinking Water Kit

    AQUAFx

    Complete Drinking Water Kit

    Add drinking water to your current RO or RO/DI system...Add drinking water to your current RO or RO/DI system. * A wonderful addition to any of our systems * Provides drinking, cooking, and water for your ice machine too * Imagine clear ice, no more...

    $119.95
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  • Pinpoint Conductivity Monitor

    Pinpoint - American Marine

    Pinpoint Conductivity Monitor

    Pinpoint Conductivity Monitor by American MarinePINPOINT Conductivity Monitor™ is an instrument for the measurement of hardness in freshwater. The conversions are 33 µS=17.9 ppm=1dH. Good quality reverse osmosis water measures 5–15...

    $117.95
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  • AQUATECH 8800 RO Booster Pump AQUATECH 8800 RO Booster Pump

    AQUAFx

    AQUATECH 8800 RO Booster Pump

    AQUATECH 8800 RO Booster pump Assembly.Includes: * AquaTech 8800 booster pump, Model No: B851-2J03-B423 Demand activated (When pressure decreases). For low pressure situations. Every reverse osmosis system requires a minimum of 35 psi to operate...

    $99.95
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  • IceCap Reverse Osmosis Booster Pump IceCap Reverse Osmosis Booster Pump IceCap Reverse Osmosis Booster Pump

    IceCap

    IceCap Reverse Osmosis Booster Pump

    IceCap Reverse Osmosis Booster Pump Replacement high flow booster pump for the Smart RO/DI system. Does not include 1/4in quick connection fittings or power supply. Improves waste water ratio Capable up to 140PSI Enhances membrane rejection...

    Was: $104.99
    Now: $83.99
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  • NH2CL (Chloramine) Blaster Upgrade Kit NH2CL (Chloramine) Blaster Upgrade Kit

    AQUAFx

    NH2CL (Chloramine) Blaster Upgrade Kit

    A standard carbon block works well to remove chlorine, however, more and more municipalities are adding ammonia to the water treatment processes to stabalize the chlorine from releasing harmful by-products into the water...A standard carbon block works...

    $69.95
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  • Add-On DI Filter Add-On DI Filter

    AQUAFx

    Add-On DI Filter

    Add-On DI Filter Add On a 10 X 2 inch or 20 X 2 inch DI Filter  This Add On DI can be used with most RO units or used alone. 18 meg water at your fingertips! The unit come filled with: Nuclear grade, virgin, color indicating...

    $59.95
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  • Piggy Back RO Membrane

    AQUAFx

    Piggy Back RO Membrane

    Double your output! Add 2 and Triple your output!...Double your output! Add 2 and Triple your output! Includes: * 100 GPD {DOW -75} Reverse Osmosis Membrane * Membrane Housing w/ Clips * Tee's w/ 1 piggy back, Crosses w/ 2 piggy backs * TubingProduct...

    $59.95
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  • AutoAqua Digital Inline TDS - Titanium S3 AutoAqua Digital Inline TDS - Titanium S3

    AutoAqua

    AutoAqua Digital Inline TDS - Titanium S3

    AutoAqua Digital Inline TDS - Titanium S3 Are you tired of big, boxy, hard-to-read TDS meters? So are we! That’s why we built the AutoAqua Titanium Series TDS meters. They are small, easy-to-use, and have a big bright screen to make checking your...

    $49.99
    Add to Cart
  • 4.4 Gal RO Pressure Tank

    AQUAFx

    4.4 Gal RO Pressure Tank

    4.4 Gal RO Pressure Tank.Pre-pressurized bladder tanks. Pressured bladder tanks have several advantages over atmospheric tanks. Pressurized tanks do not require any delivery pump and are less likely to have microbial contamination versus atmospheric...

    $49.95
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  • HM Digital Triple In-Line TDS Monitor

    HM Digital Triple In-Line TDS Monitor

    Dual Inline TDS Meter Measure the tap water coming in vs. the purified water going out of your system at any time. Use the monitor to determine when the filters need to be changed. Install the meter for your customers so they'll always know how their...

    $49.95
    Add to Cart
  • IceCap Dual DI Filter Canister IceCap Dual DI Filter Canister IceCap Dual DI Filter Canister IceCap Dual DI Filter Canister

    IceCap

    IceCap Dual DI Filter Canister

    IceCap Dual DI Filter Canister  The IceCap Dual Stage DI systems are designed to effectively treat filtered water before using it in your aquarium. The Dual DI stage filter helps remove excessive amounts of TDS and contaminants like ammonia,...

    Was: $59.99
    Now: $47.99
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  • 4 Stage RO/DI Filter Set 4 Stage RO/DI Filter Set 4 Stage RO/DI Filter Set 4 Stage RO/DI Filter Set 4 Stage RO/DI Filter Set

    AquaCave

    4 Stage RO/DI Filter Set

    4 stage RO/DI Filter Set. Fit most stondard 10" RO/DI units. Recommended replacement time is 4-6 months. 1 Sediment Filter 1 Carbon Block ( Matrikx +CTO Carbon Block Filter 5 micron) 2 DI Cartridges 4 stage RO/DI Filter Set. Fit most...

    Was: $54.95
    Now: $46.71
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  • Spectra Pure MaxCap Super DI Cartridge (DI-MC-10HC) Spectra Pure MaxCap Super DI Cartridge (DI-MC-10HC)

    SpectraPure

    Spectra Pure MaxCap Super DI Cartridge (DI-MC-10HC)

    Spectra Pure MaxCap Super DI Cartridge (DI-MC-10HC)SpectraPure, Inc. Revolutionary MaxCap DI cartridge has over 3 times more capacity than any other Mixed-Bed or Hi-Silica removal deionizing cartridge. When placed upstream of your existing DI cartridge,...

    $45.99
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  • Spectra Pure Standard 90 GPD RO Membrane Spectra Pure Standard 90 GPD RO Membrane

    Spectra Pure Standard 90 GPD RO Membrane

    Spectra Pure Standard 90 GPD RO MembraneNo other membrane can match the SpectraSelect for long life and the ability to remove silica phosphates, nitrates, and heavy metals. SpectraPure SpectraSelect membranes are individually tested and hand picked for...

    Was: $49.99
    Now: $42.49
    Sold Out - More on the way
  • AutoAqua Digital Inline TDS - Titanium S2 AutoAqua Digital Inline TDS - Titanium S2

    AutoAqua

    AutoAqua Digital Inline TDS - Titanium S2

    AutoAqua Digital Inline TDS - Titanium S2 Are you tired of big, boxy, hard-to-read TDS meters? So are we! That’s why we built the AutoAqua Titanium Series TDS meters. They are small, easy-to-use, and have a big bright screen to make checking your...

    $39.99
    Add to Cart
  • 150 GPD Reverse Osmosis Membrane CSM RE2012-LPF 150 GPD Reverse Osmosis Membrane CSM RE2012-LPF

    CSM

    150 GPD Reverse Osmosis Membrane CSM RE2012-LPF

    150 GPD Reverse Osmosis Membrane CSM RE2012-LPF We recommend flushing for 5 minutes to prevent earlier clogging.The first full tank of permeate should be discard. Do not use this initial permeate for drinking water of food preparation.Keep elements...

    Was: $44.95
    Now: $38.21
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  • Dual Inline TDS Meter

    AQUAFx

    Dual Inline TDS Meter

    Dual Inline TDS Meter Measure the tap water coming in vs. the purified water going out of your system at any time. Use the monitor to determine when the filters need to be changed. Install the meter for your customers so they'll always know how their...

    $34.95
    Add to Cart
  • 4-Stage RO/DI Filter Set 4-Stage RO/DI Filter Set 4-Stage RO/DI Filter Set 4-Stage RO/DI Filter Set

    AquaCave

    4-Stage RO/DI Filter Set

    4 stage RO/DI Filter Set Fit most standard 10" RO/DI units. Recommended replacement time is 4-6 months. * 1 Sediment Filter* 1 Carbon Block (Matrikx +CTO Carbon Block Filter 5 micron)* 2 x 1.25 lb. color-changing DI resin 4 stage RO/DI Filter Set. Fit...

    Was: $40.95
    Now: $34.81
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  • 75 GPD Reverse Osmosis Membrane CSM RE1812 75 GPD Reverse Osmosis Membrane CSM RE1812

    AQUAFx

    75 GPD Reverse Osmosis Membrane CSM RE1812

    ****Fits most standard 10" RO & RO/DI Systems including KENT, CoraLife, Seachem, AquaFx, SpectraPure.****  75 GPD Reverse Osmosis Membrane CSM RE1812We recommend flushing for 5 minutes to prevent earlier clogging.The first full tank of permeate...

    Was: $37.95
    Now: $32.26
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  • 100 GPD Reverse Osmosis Membrane - LG Chem LGTWRO 100 GPD Reverse Osmosis Membrane - LG Chem LGTWRO 100 GPD Reverse Osmosis Membrane - LG Chem LGTWRO 100 GPD Reverse Osmosis Membrane - LG Chem LGTWRO

    CSM

    100 GPD Reverse Osmosis Membrane - LG Chem LGTWRO

    ****Fits most standard 10" RO & RO/DI Systems including Vertex, KENT, CoraLife, Seachem, AquaFx, SpectraPure.****  100 GPD Reverse Osmosis Membrane - LG Chem LGTWRO 100 GPD membrane features a 98% rejection rate at 50 PSI which makes it...

    Was: $39.95
    Now: $31.96
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  • AutoAqua Digital Inline TDS - Titanium One AutoAqua Digital Inline TDS - Titanium One

    AutoAqua

    AutoAqua Digital Inline TDS - Titanium One

    AutoAqua Digital Inline TDS - Titanium One Are you tired of big, boxy, hard-to-read TDS meters? So are we! That’s why we built the AutoAqua Titanium Series TDS meters. They are small, easy-to-use, and have a big bright screen to make checking your...

    $29.99
    Add to Cart
  • AutoAqua Digital Inline TDS - Titanium S1 AutoAqua Digital Inline TDS - Titanium S1

    AutoAqua

    AutoAqua Digital Inline TDS - Titanium S1

    AutoAqua Digital Inline TDS - Titanium S1 Are you tired of big, boxy, hard-to-read TDS meters? So are we! That’s why we built the AutoAqua Titanium Series TDS meters. They are small, easy-to-use, and have a big bright screen to make checking your...

    $29.99
    Add to Cart
  • 50 GPD Reverse Osmosis Membrane 50 GPD Reverse Osmosis Membrane 50 GPD Reverse Osmosis Membrane 50 GPD Reverse Osmosis Membrane

    CSM

    50 GPD Reverse Osmosis Membrane

    ****Fits most standard 10" RO & RO/DI Systems including KENT, CoraLife, Seachem, AquaFx, SpectraPure.****We recommend flushing for 5 minutes to prevent earlier clogging.The first full tank of permeate should be discard. Do not use this initial...

    Was: $34.95
    Now: $29.71
    Add to Cart
  • 3 stage RO/DI Filter Set 3 stage RO/DI Filter Set 3 stage RO/DI Filter Set 3 stage RO/DI Filter Set

    AquaCave

    3 stage RO/DI Filter Set

    3 stage RO/DI Filter Set. Fit most stondard 10" RO/DI units. Recommended replacement time is 4-6 months. * 1 Sediment Filter * 1 Carbon Block (Matrikx +CTO Carbon Block Filter 5 micron) * 1 DI filter (color changing resin)3 stage RO/DI Filter Set...

    Was: $33.95
    Now: $27.16
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  • 3-stage RO/DI Filter Set 3-stage RO/DI Filter Set 3-stage RO/DI Filter Set 3-stage RO/DI Filter Set

    AquaCave

    3-stage RO/DI Filter Set

    3 stage RO/DI Filter Set. Fit most standard 10" RO/DI units. Recommended replacement time is 4-6 months.* 1 Sediment Filter* 1 Carbon Block (Matrikx +CTO Carbon Block Filter 5 micron)* 1 x 1.25 lb. color-changing DI resin3 stage RO/DI Filter Set. Fit...

    Was: $26.95
    Now: $21.56
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  • NH2CL Chloramine Blaster Carbon Filter 10" x 2.5" NH2CL Chloramine Blaster Carbon Filter 10" x 2.5"

    AQUAFx

    NH2CL Chloramine Blaster Carbon Filter 10" x 2.5"

    NH2CL Chloramine Blaster Carbon Filter 10" x 2.5" Activated catalytic carbon for chlorine and ammonia removal (NH2CL). Also removes other volatile and organic compounds. ****Fits most standard 10" RO & RO/DI Systems including KENT, CoraLife,...

    Was: $21.95
    Now: $18.66
    Add to Cart
  • Adjustable Float Valve

    AquaCave

    Adjustable Float Valve

    Adjustable Float Valve. Fits standard 1/4" RO tubing.Mounting requires drilling a 5/8" hole.Adjustable Float Valve. Fits standard 1/4" RO tubing.Mounting requires drilling a 5/8" hole.Product code: 1553Item No. PL-FV-SSA

    $17.95
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  • Vertex Auto-Shut-off Valve Vertex Auto-Shut-off Valve

    Vertex Auto-Shut-off Valve

    Vertex Auto-Shut-off Valve Auto shut off valve for Reverse Osmosis water systems Vertex Auto-Shut-off Valve Auto shut off valve for Reverse Osmosis water systems Product code: 7711Item No. RO-VT-ASO

    $16.99
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  • Fixed Float Valve

    AquaCave

    Fixed Float Valve

    Fixed Float Valve. Fits standard 1/4" RO tubing.Mounting requires drilling a 5/8" hole.Fixed Float Valve. Fits standard 1/4" RO tubing.Mounting requires drilling a 5/8" hole.Product code: 5066Item No. PL-FV-SSF

    $15.95
    Add to Cart
  • Taste & Odor Polisher Taste & Odor Polisher

    AQUAFx

    Taste & Odor Polisher

    Used as a final polisher for your drinking water system. Removes unwanted tastes & odor.Used as a final polisher for your drinking water system. Removes unwanted tastes & odor.Product code: 1137Item No. RO-CA-TOP

    Was: $16.95
    Now: $14.41
    Add to Cart
  • DI Resin, Mixed Bed Color Changing, 1.25 lbs DI Resin, Mixed Bed Color Changing, 1.25 lbs DI Resin, Mixed Bed Color Changing, 1.25 lbs

    AquaCave

    DI Resin, Mixed Bed Color Changing, 1.25 lbs

    DI Resin, Mixed Bed Color Changing, 1.25 lbs. ResinTech MBD-30 is a one-to-one volume mixture of CG8-H (a hydrogen form amber colored strong acid cation resin) and SBG1-OH-ID (a blue colored hydroxide form type 1 strong base anion resin)...

    Was: $13.95
    Now: $11.86
    Add to Cart
60 of 87 Items

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