I recently just lost two clowns to what I suspected was velvet. They died about 24 hours apart and a few days prior had an almost dusty look to them. I do not have a QT as I am new to the hobby and my DT is 15g and don’t have anymore room in my apartment. The only other fish I have in the tank is a Yellow watchman goby. He is not showing any signs or symptoms of velvet but I am seeing I need to fallow the tank. Is there any chance this one wasn’t velvet and two if it is getting rid of it without removing the goby?