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Old 09-15-2006, 09:35 PM   #1
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reverse osmosis machine?

correct me if im wrong, im under the impression that you need to have reverse osmosis water before you add the marine salt. i havent seen any in the stores. who all has one, and how much do they cost? or how many of you just buy pre mixed sw like at petco?
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Old 09-15-2006, 11:14 PM   #2
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check filterdirect on ebay. they have good ro/di units for about 110 bucks. ro units will be better for your tank and cheaper than premixed water in the long run.

i have one of these filters from ebay and at a reef meeting last week i found out that i was starting out with the worst water sample and the ro water from my unit was more pure than the other more expensive units.easy to install also.
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Old 09-16-2006, 01:05 AM   #3
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how do they work? i kinda imagined you pour tap water into them, then dump it into the tank? or are the connected to the tank?
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Old 09-16-2006, 11:45 AM   #4
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They are units that you hook you to your own plumbing and you water pressure moves the water through it.It mostly a series a fine filters with deionizing media after that...it can be collected in whatever container you would like.I'll edit this in a minute after I find the link,the visual will help.

Fwiw we just installed this unit under my sink yesterday.

Edit:http://cgi.ebay.com/AQUARIUM-2-110GP...QQcmdZViewItem
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Old 09-16-2006, 12:07 PM   #5
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http://cgi.ebay.com/WaterGeneral-RO6...QQcmdZViewItem

this is the one i have and i like that it has the tank and ro faucet for drinking water.very happy with this unit.the one that scfatz listed is the one i originally wanted but they were out of stock. the water coming from this unit is so clean that i think the tank would be more usfule instead of the 2nd di chamber unless your tap water has a high phosphate content to begin with.tank holds about 3 gallons of water.
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Old 09-16-2006, 04:44 PM   #6
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thanks for the links, so a RO water machine is really just a water filter. how expensive are they to maintain? buying new filters and stuff?
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Old 09-16-2006, 10:33 PM   #7
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you should replace the membrane once a year. the di resin and carbon filters about every 6 months. probably around $100-140 a year on maintanance. this is just a rough guess. you have to test the water coming from the filter to see when you need to replace things.
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Old 09-17-2006, 12:49 AM   #8
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do sw fish really need RO water? or can they live without it, and just use regular dechlor water?
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Old 09-17-2006, 09:16 AM   #9
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I'v only had my tank running for a few months so I'm no expert. My tank is in my office so installing a RO/DI would be problematic. I use tap water that has dechlorinator added. So far I haven't had a problem.

If I had the tank at home I'd probably spend the $100-$150 and eliminate any possibility of adding something undesirable to the display tank. With all of the money that I've put into this tank, cutting corners to save a few bucks doesn't make much sense.
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Old 09-17-2006, 11:54 PM   #10
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thats actually really interesting.

im only setting up a 10gal that my african clawed frog lived in before he got bumped up to the 20gal. so i already got the hood and everything, really if i just keep some LR and some snails and inverts, (i know this sounds really unanimal rights of me) but nothing to loose.

eventually if this works out, maybe a brown clown goby. hope yours works out for you charlie, keep me posted if anything happens, and you think its because of non-RO/DI water
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