Have had a lot of rain here lately where I am in GA, and needed to vacuum pool more often. Also higher amounts of pollen on bottom of pool. Water has been crystal clear but I thought I would try putting to DE in hoping to have filter catch more of the pollen, etc. So followed the steps to add, and seems quite a bit of the DE blows out the return and clouded the water some. From what I have read, this means I have a Sand filter issue, correct? Where should I start?