Hey guys, my cartridge filter is only 4 months old and doesnt filter for more than 2 days succesfully. When I first installed It work at 8psi, I was told by the pool suplier that anything between 8-12psi is just fine and that I should only cleaned once it reach 15psi or more. So once it reach 15 psi pressure I took it off and washed off, right away the pressure stuck at 12psi and only lasted 2-3 days before I had to washed off again. If I vacuum the pool I had to washed off the filter that same day. I tried several options to no avail, Filter degraser, acid wash, letting dry completely in the sun... I was told by the pool supplier that the filter should last between 8 mths and a year. The first time I washed off the filter never returned the same bright white color, as you can see by the picture it is like a beige-gray like color, and thats after thoroughly washed and dried on the sun. Any suggestions are greatfully accepted.