Ok, so here is my delema. I aquired a 125 gal with equipment and began my adventure back into the hobby. Wanting to do it on a budget I used the filter system it came with,a Fluval FX4. Yes I know a canister with the plan to add a sump later. I've ran canisters on tanks in the past with sucess but prefer sumps. Well I began doing my research and relized I might be in trouble adding a sump. The stand it sits on has two cabinet areas on each side and shelves in the middle. The worry is the cabinet areas are small. Like 21"w X 16"d X 23"h . So Im at a loss with what to do. Changing the stand is not an option so looking for suggestions not bashing please.