Hi, I've been wanting to get some neons or some other small colorful fish for my 55g tank, but since everything has been great for over 8 months (no diseases or spikes in ammonia) I'm worried about introducing anything to it. I don't have any tank I can use for a quarantine tank, so I was wondering could I just put Melafix in with the new fish for the first week so nothing gets brought in or would that have it's own set of problems?