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Old 01-13-2004, 10:48 AM   #1
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What is a RO for changing water.

I have had my tank for 4 months now. I have been adding in water from the sink that I have been adding primer to (nitrates, nitrites, amonia, clorine remover). Is this bad for my aquarium. What should I be doing. What is a RO. Where do I buy it. How much does it cost.

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Old 01-13-2004, 11:05 AM   #2
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RO is Reverse Osmosis. DI is De-Ionized water. RO/DI is when you have both together in the same system.

It's a filter for your tap water. There is TONS you can read about it here and other places online.

My tap water has a Total Disolved Solids (TDS) reading of 219. For lack of a better word, TDS tells us how pure the water is where a zero reading is perfect.

The water that exits my RO/DI filter is currently ready about 6, but I expect it to drop to 1 after another day or so.

I would recommend trying to use something other than straight tap water for your salt-water tank.

I got my RO/DI filter on eBay for about $100.


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Old 01-13-2004, 11:51 AM   #3
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For a salt water system an RO filter is, IMO, necessary. The amount of "stuff" in tap water, if not filtered.

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Old 01-13-2004, 02:09 PM   #4
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The cost of the RO unit should be seen as an invest ment rather than an expense. We use it for alot more than just tank water at home. I use RO water for the cats bowls, for the freshwater tank and for our chilled drinking water for example.

You can often find RO water from dispensers at wal-mart or other retailers. I belive the cost is usually somethine like $.25-$.50/gal.
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