Considering a 8' or 10' tank, not much of a difference other than how deep I make the tank. How important is it to have access to the back panel? It won't be an in wall install so I'd need to move it away from the wall the install it so I'm wondering how critical it is to have access to the back panel. If it's necessary I'll probably go 10' with a 3' deep tank vs 3.5/4'.