I used the HTH shock green to blue granules, and its been 5 days and still cant get all the granules off the bottom of pool, its 28,000 gallons and pump is 2 speed pump and has been alternating between low speed and high for days, i cleaned oit the cartridge filters twice, they were pretty clogged, any suggestions, i also have been brushing the sediment towards floor drains, and pole vacuums, but still a lot left, any ideas