I have a 10" fire eel in my 60 community tank - 6" peacock bass, black skirt tetras, 2" calvus cichlids. Every morning, I find the eel in 1 of my 2 aquaclear 110 filter canisters hiding in the media. Any idea why it keeps going in there? There is approx a 1" gap between the waterfall from my tank inflow and the surface of the water. It still manages to find a way INTO the canister. 