I have an 18' X 52" steel frame intex pool with a sand filter pump. The suction seems to be diminishing slightly. Last year I found that there was debris clogging the exterior of the inlet screen (we have a skimmer, and the hose connects to a fitting that screws over top of the inlet screen). I have disconnected the skimmer hose and cleaned EVERYTHING else out, including backwashing, but I am concerned that there may be debris trapped on the inside of the screen. As far as I know the only way to check the inside of that connection is to drain the pool to the inlet level and take it completely apart to check it...any advise on a simpler way to clean the inlet without disconnecting? Also I am only getting about 1.5 to 2 lbs of pressure...is that normal /enough?