Hi , I have a problem with the pump priming. It almost fills to the top then a loud gurgling noise comes from behind the skimmer and the water drops half way down the basket. I tried putting a hose up the pipe with a towel wrapped around and then all the water went down in the skimmer box like someone had pulled the plug (had to keep hold of the hose pretty tight to) then the water came back again. Any help appreciated. (I have checked o-ring on pump basket and my cartridge filter is clean).
The pool is just over 2 years old, inground fiberglass, with salt water.