I have a 250g dual overflow tank that runs down into my basement to my sump and is returned by a Reeflo Barracuda/hammerhead pump. I have the barracuda propeller in and it is pushing up water faster than it can return it. Currently it runs up to the floor joist 7 feet up and then over 8 feet then back up to the thank about 4 feet up. Any way to increase flow back down to the tank?