so in the past like 2 or so days, ive noticed my clownfish is resting on the bottom alot. but whenever i walk over to the tank he gets back up and starts begging for food. he eats fine btw. and today, i saw something on his fin. it wasnt like ich or anything, it kinda looked like a piece of debris was just stuck on his fin. i added a air pump just in case and i am going to do a 25% water change on the tank incase it is an ammonia issue (the person who came over might have overfed my tank). i dont have a test kit rn but the tank is around 76-78, it is a filtered 10 gallon with another fish in the tank being a small orchid dottyback. the clown and the dottyback are just waiting for their tank upgrade to be done. below should be videos showing the situation. the video with him swimming is to show the white debris piece on his side. the other video with him resting on the ground is to show what he looks like when im not there. he has never had any problems in the past btw and loves eating.