I just noticed my male ocellaris clown scratching himself on my live rock. He appears to have a small white patch behind one of his fins. I've had ICH before but I knew why. My water parameters are perfect right now. I test very regularly. Almost every other day. My PH is where it should be and I add everything you can immagine to make the water perfect. He hasn't had any stress that I know of lately and he is eating fine and still frolicks around the tank. This is upsetting!! The last time one of my fish had ICH it was very sick but in another tank and managed to get back to normal. He hasn't been exposed to ICH before. What could have caused this??? Any suggestions??