I have a screen top on my tank that has a bout a 1 inch gap at the back for some plumbing. I just got home and looked at my tank to see my clown fish jumped the gap, and was sitting on top of the screen. A clump of algae blocked my overflow slightly, causing the water level to raise up about 1/2 more then normal so that the screen was slightly submerged with his weight in the cent , and the clown fish had his mouth, just barely underwater and half of himself exposed to air…. He seems ok so far….

