ok, so heres my problem, a while ago i noticed some algae starting on the side of my pool, or i did a total clean out of my de filter, which is a pentair 4000 series smwp 4060. i put it all back together and everything is looking like its fine. i go out back a few days later a notice the entire pool is now green and my waterfall and baracuda are no longer active. i check the pump and its running, so i clean out the basket, but still no avail to fix the problem. i clean the filter again and recharge the de, but within about 30 minutes of turning the pump on, the baracuda slowly comes to a stop and the water fall stops as well.... getting pretty frustrated, i clean the filter again, still with the same results. no my pool has turned into a small scummy pond with bugs living in it. ive shocked the water and still no good... not really sure what i should do... i pull out the de grids and run the system without any filter elements what so ever and the problem doesnt come back. is it a problem with my filter girds? are they just plugged up and need to be cleared? can they be cleared? should they just be replaced?? any help is much appreciated as to the fact that im so fed up with it, im about ready to just buy a completely new cartridge filter. please help!!