Quote Originally Posted by johnnyf0614 View Post
Where do I add the DE??? in the center of the cartridge? down the skimmer? I have an Astral 150 Cartridge filter for a 12X18 pool, 1.5 HP pump.....
Just dump the DE straight into the skimmer basket with the pump running. I reiterate, this method delivers sparkling clear water much much quicker in cartridge filters. The old man I bought the house from told me to do it but then I read that the cartridge manufacturers don't endorse this method so I stopped. My water was never truly clear again until I started using the DE once more. Just keep an eye on your pressure and rinse the cartridges often until you get the gunk out. The cartridges trap so much gunk with the DE you will be amazed. After that you don't need to clean them any more often than without the DE.