I added a tang to my tank and he developed ich after 1 day. Removed the tang but I still have a wrasse in my tank. Would it be a good idea to get him out and go fishless for two months or should I leave my wrasse (only fish left in tank) and wait two months to add anymore and see if he develops ich? I don’t want to add more fish in two months and there was still ich in my system from the wrasse!