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 AQUARIUM II RO DI REVERSE OSMOSIS WATER FILTER AQUASAFE $96.99 Time Remaining: 23d 15m Buy It Now for only: $96.99 |
 AQUARIUM II RO DI REVERSE OSMOSIS WATER FILTER AQUASAFE $98.99 (1 Bid) Time Remaining: 1d 3h 59m |
 Float Valve All Plastic Reef Aquarium Top Off RODI Water Filter Reverse Osmosis $9.95 Time Remaining: 16d 19h 23m Buy It Now for only: $9.95 |
 0 PPM 6st Reverse Osmosis 2 OUTPUT RO DI Water Filters $106.00 Time Remaining: 20d 8h 42m Buy It Now for only: $106.00 |
 Reverse Osmosis Water Filter TFC Membrane RO DI 75GPD $33.24 Time Remaining: 16h 38m Buy It Now for only: $33.24 |
 Oceanic REVERSE OSMOSIS RO DI REEF AQUARIUM REEF WATER FILTER 5 STAGE 75GPD $103.55 Time Remaining: 5d 19h 3m Buy It Now for only: $103.55 |
 Garden Laundry hose adapter connect RO DI systems Portable RO Water Filter $4.74 Time Remaining: 28d 2h 58m Buy It Now for only: $4.74 |
 Float Valve All Plastic Reef Aquarium Sump RO DI Water Filter Reverse Osmosis $9.95 Time Remaining: 17d 18h 27m Buy It Now for only: $9.95 |
 20 Sediment Carbon Water filters Reverse Osmosis RO DI $53.99 Time Remaining: 20d 22h 24m Buy It Now for only: $53.99 |
 Tubing Polyethylene 1 4 NSF 50 Feet Reverse Osmosis RODI Filter Aquarium Reef $14.99 Time Remaining: 12d 18h 5m Buy It Now for only: $14.99 |
 75GPD 6 Stage Reverse Osmosis RO DI Water Filter RCW7DT $138.69 Time Remaining: 27d 2h 21m Buy It Now for only: $138.69 |
 Float Valve Reef Aquarium Sump Auto Top Off System RO DI Water Filter complete $22.50 Time Remaining: 24d 12h 16m Buy It Now for only: $22.50 |
 AQUARIUM II RO DI REVERSE OSMOSIS WATER FILTER AQUASAFE $98.99 Time Remaining: 2d 20h 20m |
 Reverse Osmosis Water Storage Tank 4 gallon Bladder RODI Water Filter Valve tube $29.50 Time Remaining: 17d 20h 26m Buy It Now for only: $29.50 |
 100 GALLON REVERSE OSMOSIS SYSTEM USA MADE MEMBRANE RODI WATER FILTER REPLACEMEN $46.99 Time Remaining: 27d 2h 11m Buy It Now for only: $46.99 |
 Booster Pump Reverse Osmosis Water Filter 50GPD High Flow Pressure RODI Pump $68.00 Time Remaining: 27d 16h 36m Buy It Now for only: $68.00 |
 Aquarium Reverse Osmosis RO DI Water Filter 150gpd Reef Dual TDS Meter Flush Kit $169.00 Time Remaining: 17d 20h 26m Buy It Now for only: $169.00 |
 Reverse Osmosis Auto Shut Off Solenoid Kit w Check Valve Tubing RODI Reef Filter $12.00 Time Remaining: 24d 13h 9m Buy It Now for only: $12.00 |
 Portable Reef Aquarium Reverse Osmosis RO DI 3 stage water filter $109.00 Time Remaining: 13d 16m Buy It Now for only: $109.00 |
 REEF HOME DRINKING RO+DI dual output REVERSE OSMOSIS PURE WATER FILTER SYSTEM $167.20 Time Remaining: 20d 14h 22m Buy It Now for only: $167.20 |
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 Pressure Gauge Reverse Osmosis Complete Add On Kit PSI 100 RO DI Water Filter $12.00 Time Remaining: 8d 16h 28m Buy It Now for only: $12.00 |
 4 RO DI AQUARIUM REVERSE OSMOSIS WATER FILTERS MEMBRANE $56.60 Time Remaining: 26d 1h 35m Buy It Now for only: $56.60 |
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 Reverse Osmosis Reef Aquarium RODI Water Filter Sediment 2 Carbon Blocks Resin $32.00 Time Remaining: 29d 18h 7m Buy It Now for only: $32.00 |
 50 RO DI Water Filter 10 Sediment 5 Micron FP15X50 $56.99 Time Remaining: 2d 13h 16m Buy It Now for only: $56.99 |
 RO DI WATER FILTER DUAL MBD 20 NUCLEAR GRADE DI RESIN W TDS METER $79.95 Time Remaining: 14d 19h 58m Buy It Now for only: $79.95 |
 REEF HOME DRINKING RO+DI dual output REVERSE OSMOSIS PURE WATER FILTER SYSTEM $152.00 Time Remaining: 1d 14h 1m Buy It Now for only: $168.00 |
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 85 GALLON REVERSE OSMOSIS SYSTEM USA MADE MEMBRANE RODI WATER FILTER REPLACEMENT $44.99 Time Remaining: 27d 2h 12m Buy It Now for only: $44.99 |
 Booster Pump Reverse Osmosis Water Filter 50GPD With High Pressure Switch RODI $69.00 Time Remaining: 27d 18h 37m Buy It Now for only: $69.00 |
 Reverse Osmosis RODI Water Filter Set 1Sediment 2Carbon Block Resin 75Membrane $68.00 Time Remaining: 29d 18h 8m Buy It Now for only: $68.00 |
 New 4 stage RO DI reef aquarium reverse osmosis 75 GPD ultra pure water filter $139.00 Time Remaining: 27d 3h 26m Buy It Now for only: $139.00 |
 4 1 MICRON CARBON BLOCK FILTERS REVERSE OSMOSIS RO DI $28.00 Time Remaining: 19d 19h 34m Buy It Now for only: $28.00 |
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 Automatic Shut Off Solenoid Valve Quick Connect 1 4 Reverse Osmosis Filter RODI $6.19 Time Remaining: 24d 17h 52m Buy It Now for only: $6.19 |
 Ultimate 5 stage reef aquarium RO DI water filter system 100 gpd dual DI $183.90 Time Remaining: 12d 20h 16m Buy It Now for only: $183.90 |
 3 RO DI AQUARIUM REVERSE OSMOSIS WATER FILTERS $28.88 Time Remaining: 24d 22h Buy It Now for only: $28.88 |
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 Booster Pump + Power Reverse Osmosis Filter Aquatec 6800 RODI Water Filter Reef $89.00 Time Remaining: 7d 14h 48m Buy It Now for only: $89.00 |
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 Reverse Osmosis RODI Water Filter Reef Aquarium Saltwater 75gpd Reverse Osmosis $259.00 Time Remaining: 29d 11h 31m Buy It Now for only: $259.00 |
 TDS Meter PPM Tester for RO DI water filters reef $9.90 Time Remaining: 15d 17h 38m Buy It Now for only: $9.90 |
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 REVERSE OSMOSIS RO DI REEF AQUARIUM REEF WATER FILTER $98.88 Time Remaining: 18d 2h 1m Buy It Now for only: $98.88 |
 Reef Aquarium Reverse Osmosis Water Filter 75 Gallons RODI Color Cange Resin $139.00 Time Remaining: 21d 14h 1m Buy It Now for only: $139.00 |
 Reverse Osmosis RO DI Water Filter Reef Aquarium 150GPD Automated TDS meter $189.00 Time Remaining: 4d 15h 27m Buy It Now for only: $189.00 |
 18 RO DI REVERSE OSMOSIS WATER REEF AQUARIUM FILTERS $119.00 Time Remaining: 4d 21h 22m Buy It Now for only: $119.00 |
 RO DI Replacement Filter Kit $32.39 Time Remaining: 2d 21h 29m Buy It Now for only: $32.39 |
 REEF HOME DRINKING RO+DI dual output REVERSE OSMOSIS PURE WATER FILTER SYSTEM $152.00 Time Remaining: 2d 23h 54m Buy It Now for only: $168.00 |
 Replacement RO DI Filter Pack w 50gpd Membrane + Resin $49.99 Time Remaining: 23d 16h 22m Buy It Now for only: $49.99 |
 Max Water 5 stage 125GP Reef Aquarium RO DI Reverse Osmosis Water Filter System $139.65 Time Remaining: 27d 3h 21m Buy It Now for only: $139.65 |
 Reverse Osmosis Reef Aquarium filter 1 Micron sediment Carbon Block RODI Resin $28.50 Time Remaining: 17d 20h 24m Buy It Now for only: $28.50 |
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 Booster Pump Aquatec 8800 w pressure switch Trans Ro Di filter reverse osmosis $144.50 Time Remaining: 13d 18h 5m Buy It Now for only: $144.50 |
 WHITE MEMBRANE HOUSING STANDARD 1 8 PORT RO DI FILTER $12.99 Time Remaining: 19d 16h 3m Buy It Now for only: $12.99 |
 Reef Aquarium RO DI Water Filter DI Resin Bypass Kit Save Resin Reverse Osmosis $12.95 Time Remaining: 17d 17h 32m Buy It Now for only: $12.95 |
 REVERSE OSMOSIS RO DI REEF AQUARIUM REEF WATER FILTER 4 $99.00 Time Remaining: 18d 14m Buy It Now for only: $99.00 |
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 Booster Pump Aquatec 8800+Transformer 100 gpd Reverse Osmosis Water Filter RODI $119.00 Time Remaining: 27d 13h 13m Buy It Now for only: $119.00 |
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 REVERSE OSMOSIS RO DI REEF AQUARIUM REEF WATER FILTER $118.88 Time Remaining: 1d 2h Buy It Now for only: $118.88 |
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 RO DI Replacement Filter Kit $39.99 Time Remaining: 27d 21h 42m Buy It Now for only: $39.99 |
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 Titan Water Pro 21 REVERSE OSMOSIS RO DI WATER FILTERS CARBON SEDIMENT $65.00 Time Remaining: 11d 21h 54m Buy It Now for only: $65.00 |
 TDS Meter PPM Tester for RO DI water filters reef $9.90 Time Remaining: 20h 21m |
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 Reverse Osmosis RODI Water 2 1 Micron Sediment Carbon Block 10 filters $16.95 Time Remaining: 17d 18h 49m Buy It Now for only: $16.95 |
 Reverse Osmosis Reef Aquarium RO DI Water Filter 75 Gallons 2 DI Resin Filters $169.00 Time Remaining: 7d 14h 14m Buy It Now for only: $169.00 |
 Reverse Osmosis RO DI WATER AQUARIUM REEF FILTER 6STAGE $149.25 Time Remaining: 24d 21h 37m Buy It Now for only: $149.25 |
 3 RO DI AQUARIUM REVERSE OSMOSIS WATER FILTERS $28.88 Time Remaining: 25d 1h 34m Buy It Now for only: $28.88 |
 150 GALLON REVERSE OSMOSIS SYSTEM MEMBRANE RO DI WATER FILTER REPLACEMENT 150G $55.99 Time Remaining: 27d 2h 9m Buy It Now for only: $55.99 |
 AQUARIUM RODI FILTER REPLACMENT SED CARBON DI MEMBRANE $64.00 Time Remaining: 5d 19h 40m Buy It Now for only: $64.00 |
 Reverse Osmosis Aquarium RO DI Water Filter 75GPD Auto Top Off Chloramine W TDS $199.00 Time Remaining: 14d 20h 33m Buy It Now for only: $199.00 |
 1 set 7 pcs RO DI UV Spare Replacement Filters 150 GPD membrane FS 7BUVM150 $135.00 Time Remaining: 26d 4h 1m Buy It Now for only: $135.00 |
 Oceanic REVERSE OSMOSIS RO DI REEF AQUARIUM REEF WATER FILTER 4 STAGE 75GPD $94.05 Time Remaining: 5d 18h 57m Buy It Now for only: $94.05 |
 3 Stage RO DI filter water purifier used $19.99 Time Remaining: 1d 22h 59m |
 RO DI Combination Water Filter drinking Aquarium Reverse Osmosis with bypass $299.00 Time Remaining: 7d 9h 20m Buy It Now for only: $299.00 |
 Reverse Osmosis RO DI WATER AQUARUIM REEF FILTER 6STG $143.10 Time Remaining: 18d 1m Buy It Now for only: $143.10 |
 Reverse Osmosis Reef Aquarium RODI Water Filter 150gpd Dual TDS Meter w Carbon $169.00 Time Remaining: 15d 17h 38m Buy It Now for only: $169.00 |
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 Reverse Osmosis Reef Aquarium filter 1 Micron sediment Carbon Block RODI Resin $28.00 Time Remaining: 15d 19h Buy It Now for only: $28.00 |
 Reef Aquarium Reverse Osmosis RODI Water Filter 150gpd Dual TDS Meter DI Resin $169.00 Time Remaining: 17d 14h 45m Buy It Now for only: $169.00 |
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 Reef Aquarium Reverse Osmosis Water Filter 75GPD Dual Carbon RODI Color Resin $149.00 Time Remaining: 24d 18h 9m Buy It Now for only: $149.00 |
 Catalytic Carbon Upgrade Reef Clear 5Micron Sediment RO DI Water Filter aquarium $17.95 Time Remaining: 17d 19h 25m Buy It Now for only: $17.95 |
 Reef Aquarium Reverse Osmosis RODI Filter Sediment Carbon Block Deionized Resin $30.00 Time Remaining: 14d 20h 36m Buy It Now for only: $30.00 |
Rodi Filter
How to check RODI water is safe for Reef aquarium?
Is there any test we can do chemically or any way to prove that the water is safe for reef aquarium and has passed thru reverse osmosis de-ionized (RODI) filters before adding salt mix .Some people suggested me to get water from walmart,whole food stores coz they sell rodi water cheaper than fish store ($1/Gal),has anyone ever brought that water and then added salt mix and used for a reef tank ??? Thank you.
Everything you test if for should be around zero, except for pH which should be approx 7.
As long as hardness, nitrate, phosphate, ammonia (and anything else you have a test for) is approx zero, then it's practically pure water. Add your salt mix and be happy. If you get significant readings for any of those, then it's not pure RO water, and you are being ripped off.
Some peoples tap water is clean enough to mix for reef tanks, but most tap water has all sorts of random nitrate, carbonate, magnesium, calcium phosphate etc that messes with the exact chemical makeup of your salt water. If you start with practically pure RO water, then your end mix should be more exactly like sea water.
Ian
Edit for Ryan.
You are correct the pH will be 8.4, AFTER adding the marine mix to the PURE water. The pure RO water that he is starting with should have a pH around 7. If you take pH 8 water, it already contains dissolved minerals, add the marine salt mix to whatever random chemicals are in that water, and you get more Total Dissolved Solids than should be in sea-water, and they may be in the wrong proportions. The Question is about testing RO water, to see if it's pure, not testing sea-water.
RO/DI System With Booster Pump