If anyone can tell me if removing some of my sandbed, running a uv, etc could lessen the chance of my clown getting sick since she is now back in the dt...OR how long does she have to go with no symptoms before I can assume my dt is safe for new fish...I would really and sincerely appreciate it. I'm not looking for lectures about ammonia, aeration, or using copper. I'm well aware of the things necessary to keep fish alive and healthy and well aware I screwed the whole thing up. Thank you.