If that's the only cover it has then yes. Other than that, it may be attracted to the electricity emitting from it. You might want to check that out.
I wonder the same. Mine grows pretty slow too even tho he eats a lot of different stuff - bloodworms, mysis, brine, tubifex, earthworm from time to time, etc.
Anyone know if it'd really be bad to keep it in a 36x18x24 65gallon permanently? I'd think it should be ok