Hey guys, just found this site out of necessity. Just installed a new filter yesterday as the old one stopped filtering completely (dirt would just come in and go out the jets). Anyways, this one is a hayward, can't remember the model number, but I remember it took 300 lbs of sand. So I start backwashing after installing it, and go outside, and there is some sand in the grass.. maybe 5 pounds or so.. Stick my hand in front of it and I feel the odd particle of sand coming out. Thought maybe I got some in the tube, but couldn't have as I put a rag in it and put their cardboard template over it while filling it with sand. Tried to filter my pool and let it run for 5 minutes, but there was a light sprinkling of sand over the bottom, and I can feel some particles coming out of the jets. Not enough to see, but I can feel it. I filled the filter with water as per their instructions so as to not crack the things on the bottom of the filter. The bag doesn't say what size the sand it, but feels pretty coarse. The guy seemed to know what he was talking about to (sold the sand and filter together). Could it be defective? The glass viewing thing on the filter always has sand on the bottom of it too. SOme water leaking out around the fitting (pump/return/backwash) but I don't see how that would have anything to do with it. ANwyays, thanks in advance guys, appreciate it.