So a couple weeks ago my blue tang got ich. I put her in a QT, and 2 days later she died. I went and just looked at my tank and 2 of my clowns both have ich. I have 3 clowns, a BTA, a sand sifting starfish, a fire shrimp, a hermit crab and 2 turbo snails. I run a tetris skimmer with just the...