I have a small above ground pool with an intex cartridge filter. I net daily, keep my chemicals up and change the filter cartridges regularly. My pool is sparkling clean, except for the sand. My pump/filter does not have enough suction, so I use one of those you hook to a waterhose. I put a pair of pantyhose over the net bag to help, but even though I spend several hours once a week vacuuming....letting everything settle and vacuuming again....more sand is always there. Its not mustard algae..it is not slim....my and moves real easily...any ideas?

Thanks,
Aymztx