I have a 112 gallon Reef tank with a decent amount of corals and a small tomini tang,1 blotchy anthias, 3 clown fish, a royal grama and a blue star leopard wrasse. I first began to see a few white spots on my 2 Picasso clowns so I removed them and treated them for ich in a 10 gallon qt tank which the ich seemed to disappear. Then a week later I went on vacation for a few days and when I came back the spots were back as well as now spots on every fish except one clownfish and the blue star leopard wrasse. How should I go about trying to get rid of ich in my tank if I should remove it at all.