I have a 55 gallon tank that I currently have nothing in, but up to about a week ago it had a Redear Sunfish in it. I collected this fish from the wild, and I know that it had anchorworms, but I treated the tank with salt and he got over them. My question is, how long can the parasites survive in the tank with no host? If I do a 100% water change, will be safe to add new fish? I am concerned that the fish may have been carrying other diseases.
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