Hi, I am planning to put a 220g and 40g sump on the first floor. Below is my basement and the tank going to sit right on top of the square box. It is a 6ft long tank and so one side is on top of the beam and the other side is close to the wall. Do you think I need a floor jack on the side close to the wall?. or it would be ok without. The tank is sitting on top of three parallel supports and I am not sure it strong enough to hold a 260g of water plus rock and sand.