i really need help on what 2 do 4 a hood 4 my tank at home its wrecking my head.. i broke me other hood wondering how would i make1??? not a hope im going 2 the pet shop 2 buy a new 1 the gave me a price and it is away 2 much... would a plain piece of wood going straight across is with a few air holes do??? does a corn really need a light please reply!!! Badly meed help.