Hi there- I just got a used Intex Ultra Frame pool, 16' x 48". The pump that came with it, also Intex, was just not doing much of anything, so I decided to invest in a new sand filter/pump combo. [h=1]Hayward S144T1540S Pro Series Top-Mount Sand Filter 14-Inch 4-way Valve and 40 GPM Pump[/h]I got it up and running, and WOW, what a difference! But then.... after a couple of hours, we noticed it wasn't sucking or blowing (sorry, but that's what it seems like) with nearly as much pressure as before. So we unplugged it (sort of a reboot) and plugged it in again. Poof!! Working great again. And then it slowly started declining. We have brand new pipes, brand new sand, using Baquacil for chemicals. Just wondering if this is something that's to be expected, or if it isn't, is there something to do? There don't appear to be any leaks anywhere. Any help is appreciated!! I'm sure I'll have many more questions