I have a Jandy CV460 Cartridge Filter. I am having an issue with low pressure. I don't know if it's a coincidence or not, but it started after we had a big storm last week. I had a very large amount of pine needles get into the pool, skimmers, and pump basket. I finally have the pool nearly clean. This morning, I cleaned the cartridges, since I thought there would be a lot of debris in them. The filter pressure is hovering around 5 PSI (it's usually around 20). I'm not sure if it's related, but the water in the pump basket looks odd. It's kind of swirling and hitting up against the glass. I don't normally see that as far as I know. It's usually much quieter, and sometimes, I don't even see water in there. Before I call out my pool company, I just wanted to see if this is something that I could fix.