I've been keeping freshwater fish since the 70s and saltwater fish since 1990 and have never quarantined or medicated a fish ever. I have never lost a fish to any disease. It looks to me like putting a fish in a quarantine sterile looking tank just causes more stress. I think getting them in your main tank as soon as possible and feeding good food cuts down on stress. I only feed fresh, frozen seafood - never dried pellets or flakes. All this quarantine medication stuff is a waste of time and money.