The Planted Tank Forum - View Single Post - My fish are struggling to breathe and are not swimming so well
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post #8 of (permalink) Old 05-19-2014, 11:08 PM
Hoppy
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Three years is much too long to go without a water change. I'm sure you had to add make-up water several times during that period, which was increasing the hardness of the water each time. And, of course, the nitrate level would be rising too, unless your plants were growing very fast and using up the nitrates. A water change every month or two is a much better idea. And, that means a 50% or so water change.

Hoppy
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