Ive got a 24"x12"x12" tank with a plec 7 zebra danions and ive added two sunset platys last week, the danios seem to have developed the tiny white spots of ich, this is the first time ive had tropical fish and i only know what ive read,im going to start raising the temperature at 1 degree every two hours but how far do i go with out it being dangerous to the fish. help!please