I recently upgraded to an Intex Krystal Clear 1200 gph Sand Filter pump combo on my round intex 15' x 48" pool and I have already had to drain once because of cloudy water and very small particles that would fall to bottom of pool. When I would try and vacuum, the particles were too small to vacuum and would just spread out again making the pool cloudy again. After draining, the particles were thick and almost like a gray mud. After draining I was able to get the pool clear again however I feel it is getting cloudy again. I use the testing strips to check chemical balance and apply as suggested. I also used floc to drop the particles to the pool floor however that is where it would get cloudy again when vacuuming. My return flow does not have the same pressure that it did when I first installed it. This is my first above ground pool so I am clueless on how to begin troubleshooting. I did plug one of the inlet holes so it down to 1 for intake.