I remembered you said that floor was a little spongy. Worse case scenario you could always throw a dropped beam under the joists with a couple columns where the front of the tank is above. This would effectively cut the span of the joists from 12-14' down to 2' so then it wouldn't matter what size the joists are.
A really savy guy could incorporate the new support to make a raised platform for his sump. That would raise it off the floor to make it easier to work in/clean and reduce the head on the pump.
Maybe you know an architect that could give you a little sketch and a contractor that could give you a hand? ;D
A really savy guy could incorporate the new support to make a raised platform for his sump. That would raise it off the floor to make it easier to work in/clean and reduce the head on the pump.
Maybe you know an architect that could give you a little sketch and a contractor that could give you a hand? ;D