I have a 40 gallon reef tank. I have at least 4 different types of coral, 2 red firefish, a watchmen goby, maroon clown, blue legged hermit crab and a Mexican Turbo snail. Everyone eats and acts normal. But I recently noticed a tiny white mucus spot near the tail of the maroon clown. At first I thought the clown fish rubbed against a rock because the way I have the tank set up , my rocks overlap with a little tunnel like space and he/she likes to swim through it. But lately I’ve been more observant and he/she seems to like rubbing near the magnetic algae scrapper brick I have and I’m scared my clown fish might have Brooklynella. This is my first reef or saltwater tank and I want to take the proper steps so all my fish and corals stay alive and healthy. At the moment it doesn’t seem too bad because the clown fish still eats and is very active and curious. So I hope I caught it early enough to treat the problem so everything could be okay. Someone please help , I’d really appreciate it.