My domino suddenly had white spots appear on him this morning. I am going to make a guess that it is ich. I want to understand if ich is something that I caused by over feeding or due to stress. Recently the dominos home was taken from him by my week old maroon clown fish. I think I will give him the fresh water bath for two minutes and then put him in a little 3 gallon tank with salt water. Any suggestions will help as I only started my tank about 1.5 months ago. In the tank is a blue devil, a maroon, and a black domino. Invert are 5 brittle starfish, 1 arrow crab, 4 hermits, and 3 turbo snails. I dont have any medications but do have access to many foods like selcon and what not. My main tank is only 20 gallons.