15 gallon saltwater tank

for those saltwater critics out there, if you going to bash and comment me about fish and tank size, i know what I am doing. The hippo tang had marine ich and still was able to have its color, appetite, and energy. If it was really in stress from the tank size then it would have .... it recovered with 1 dosage of kick ick. the rest was just time, wrasse, cleaners, and good garlic diet. I use roughly 19 lbs of live rock will have more when adding corals, skilter 250 works great, (made a bubble trap mod) and an aquaclear 30. Heater is an Elite tank consists of 1 false pecular clown 1 hippo tang 1 six line wrasse 1 fire fish 1 orange spotted file fish 2 skunk cleaner shrimp 2 turbo snails 2 red leg hermits btw tank is 3 months old