I have a 55 gallon RR tank that i will be setting up soon, but i wanted to use a used 55 gallon tank i have as a sump, i know its a little too big but i figured i would have a nice size refugium in it. now my question was can anyone help me in designing this sump, i never made one before. and i would like to utilize the size for good things and not wasted space. anyone have any ideas or a 55 that they turned into a sump themselves?