I have posted a few times on here concerning my 29 gallon that is still cycling, and now I just picked up a free 10 gallon tank from my parents with the intention of using it as a quarantine/hospital tank. I just had a couple of questions about them. Like once the quarantine is cycled, how do you keep the bio filter strong so that when you have a new or sick fish they don't just die from excess ammonia? Just keep doing what you did during the fishless cycle process? Or do you lightly stock it to keep the bio filter going? If you stock it, what is a good thing to stock it with? I figure it might be different than planning a normal stock because I would need to keep in mind the potential bioload with a new or sick fish. Thanks guys