I've got a 10 gallon tank with a hood and a cat who's nice and warm in the winter. Unfortunately, he likes to stick his paw in my tank and scoop as much water out as he can. I'm trying to think of a set-up to protect my fish from this ridiculous cat so I don't have to lock him out of my room. He doesn't care about watching the fish at all, it's all about splashing water. The hood is heavy enough to keep him from knocking it over, but there's two big open spaces where the heater and filter are. The best idea I've been able to come up with is wire mesh stuck in each hole. Does anyone have ingenious cat-proofing ideas or is that my best bet?