The Big Let Down,,,,,, Everything that I can think of is done, recheck everything, take a break come back and recheck everything again. Its time to turn the return pump on, will I have leaks everywhere, did I do everything right, kinda afraid a bit, will be ready to yank the return pump plug if things go wrong, OK its time don't be afraid, just do it. Plug in the return pump, wait for it, wait for it, here its comes Nothing, Nada, Squat what the @#$% Unplug the pump. Plug in the manifold pump into the same outlet, works fine, plug in the skimmer, everything's good. Take the return pump out of the sump, get the old pump from the old 125g, plug it in and everything's good. Guess I got a bad pump, tapped on it a bit and got it to Hummm a bit, but it won't pump water. Anyway putting salt into the sump now. Never thought to check the pump at the LFS, never would have thought it would have been bad. The good thing, we now have a tank.