Help! I have 2 quite small clownfish and one fire fish in my tank, it’s 165L so definitely big enough. Over the last few days my clowns have started acting weird in different ways? One of them is up the top of the water on its side, but not gasping for breath and when I catch it and put it in a smaller container so I can get a good look it starts swimming normally again? The other one has as of last night started lying on the bottom of the tank and it IS gasping! I’ve checked the water and all the parameters seem fine, the temp is fine, the salinity is fine, the fire fish is fine! I don’t know what to do :’( visually other than gasping both of the fish seem fine and have been fine in the tank for the last several months! Please help me.