Can anyone tell me how to remove the top, i.e. seperate the cover from the tank, from a nano cube (jbj). I know this is the wrong place for such a question, but when i asked in the products forum, all i got was a bunch of "why do you want to do that". While I admit to being a klutz, I can't believe noone else has had problems replacing the bulbs without turning the top upside down, which requires it to be unattached from the tank.