Tannic water is not harmful to fish, it is actually beneficial for them in many ways. The only downside is the appearance, but some people like it.My current goal is to convert all of my artificial decorations in my tank to a more natural landscape. My hardscape needs more driftwood, but I am concerned about tannin levels and how they might affect my freshwater fish. When it comes to driftwood in a 55 gallon freshwater tank with fish, how much is too much? My community has a total of (18) fish?
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