Yesterday I purchased a firefish and after floating the bag for 15 minutes I emptied the bag halfway and started adding my tank water slowly for the next 15 minutes then placed it in the tank. It went and hid in my rocks but was out swimming this morning. I walked by the tank and noticed it was stuck to the side of my powerhead and immediately turned it off. Now it is hiding in between the rock. I noticed that it had white marks on it's side. Is there anything I can do to help it survive?