Today i set up my 125 gallon tank. I have a amiracle sl 250 wet dry, with 1 pickup and a 950 gph mag drive pump. I have a ball valve in the pump line, and when i open it all the way so the pump is pumping its full potential, it fills the tank almost to the brim, past the overflow box. Its like the overflow cant keep up with this pump. The question it: I have another overflow box, fittings and all. Can i drill another hole into the top of my wet dry and make it a dual overflow wet dry? Also, will this fix my problem and allow me to use my pump to its potential? Thanks.