lol, I have 18 tanks running currently, the bigger they are the easier they are, It also helps to have a water alarm, its a little thing that sets off an alarm, if the water lever rises above a certain level, nixes the overfilling tank in the bud !
The other really usefull tool for tank matinence is Wataugachicken. I make her do the water changes since she's the one with severe MTS.