So I've been doing some reading here and across the interwebs, but I'm not quite finding the answer I'm looking for. We purchased an 18x9 Ultra Frame pool and it came with the SF90110T sand filter pump. We also purchased and installed the salt water system for up to 14000 gallons. We set it all up, purged all the air, and it seemed to run fine (pressure gauge reading 6 psi). We had a dust storm roll through the valley that same night, so the next morning the pressure had dropped on the filter so I backwashed all the gunk out. I decided to get in the pool and start vacuuming some of the sediment off the bottom. I managed to make about 2 9 foot passes before the suction was almost too weak to even lift the dust off the ground. So I had to get out and backwash again. I'm not sucking up *that* much dust out of the pool, is it normal for these pumps/filters to lose suction so easily? I've checked for air leaks in the hoses and haven't found any.
Suggestions? Is the included pump just too weak to be effective?