We have a DE filter that ran wonderfully last year. Something is wrong this year. At startup, we put 4lbs. of DE to coat the filter and everything started out great. Pool cleared up with lots of bleach. We noticed water wasn't pouring into the skimmer with much force and the water in the pool wasn't circulating well so we took the filter apart and cleaned it. The grids were completely empty of DE but coated with green gunk. We squirted the grids off, put 4 more lbs. of DE in the skimmer and started fresh. Pressure start out at 12 and jumps to 16-17 rather quickly (after only a couple hours) and again the water isn't flowing into the skimmer hardly at all. The return jet is just a wimpy flow. Anyone have any ideas as to what is wrong? Our pool is LOADED with pollen and the filter just isn't touching it. Last year, our filter was like Superman. My pool was crystal clear all year. Hellllllllllppppp........our kids haven't been able to swim yet!!!