The Planted Tank Forum - View Single Post - my GBRs have been dying. not sure why...
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Old 06-27-2012, 10:09 AM   #17
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Large water changes are to remove any potential remaining ich, so that when you dose again you're dealing with a smaller volume. It's how you treat most bacteria infections just incase you don't get all of it. It's probably either ich or another bacterial infection. Either way you should make the next water change after dosing a large one IME
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