So this is our first summer with our in ground pool 30,000 gal. We just replaced the pump because the old one was shot. We have a 1.5 HP pentair superflow. The pump primes but seems like its not moving enoughwater, almost like its in a soft mode. I know we have done everything correctly as far as our sand filter, releasing the pressure etc. Any ideas? I don't wanna mess his pump up...it wasn't cheap. Not to mention this is my third issue with this pool and I can't even begin to start the shocking process, I am at my wits end and about ready to just cover it back up!