PineSong Posted July 23, 2021 Share Posted July 23, 2021 I have a 5.5 gallon I was using as a hospital tank for a couple of fish that got sick during the quarantine/meds phase of my new tank. Unfortunately, the fish died, and I believe one of them had columnaris. The hospital tank has new gravel, a filter that was new when I put it in the tank, a heater and some floating plants I can keep in there or throw away. It will be a while before I buy more fish. I'd like to leave the hospital tank up and running to use as a QT tank when I do get more. But I don't want any germs the deceased fish had to stay in the tank and attack the new fish. What's the best way to proceed--how long to keep new fish out of that tank, and how to minimize the risk of anything deadly still being in there? TIA! Link to comment Share on other sites More sharing options...
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