I have a clown that looks like it is gasping, None of my other fish seem to have a problem water test where good except ammonia which was just a little high. I did a small water change (will do a larger one tomorrow when i have more water) and dosed some prime. I am thinking it must be stress because all the other fish are fine. Can you use stresscoat in salt water like you do in fresh? And would it do any good?