RO or no? - The Planted Tank Forum
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post #1 of 3 (permalink) Old 08-03-2011, 02:52 AM Thread Starter
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RO or no?

I've gotten mixed feedback from the LFS as I've started my planted tank. One person says that for plants, tap water is better because they use some of the dissolved solids in the water. Others have said use RO/DI and add equilibrium, which is what I've been doing. What is the best thing for the tank?
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post #2 of 3 (permalink) Old 08-03-2011, 04:06 AM
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You can add RO water to your tap water to decrease the hardness of the water in your tank. Adjust the water's hardness to a level that is suitable for the plants you want in your tank.

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post #3 of 3 (permalink) Old 08-03-2011, 01:03 PM
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Tap water is better in general (you get free nutrients), but there are some cases where RO is better (or 50/50 is better)
1) Extreme tap water conditions. Where i used to live, the tap water's GH was ~30*, I couldn't keep but the hardiest fish in that
2) Sensitive fish. I found out the hard way that GBR's didn't even like my water if i cut it with 50% RO
3) Sensitive plants.
4) More control over the water's parameters.
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