I just purchased a new filter that I installed and ran for approx 15-mins on Sunday May 22nd 2016.. WIthin 15 mins of turning on pointthe PSI jumped from below 10 to 25psi and then +30psi. Since I had been slamming another member advised that the PSI moves up quickly doue to all dead algae being cleaned from pool. I was out of town since last tuesday and toda started the slam process over again. Before adding chlorine I needed to lower my pH as it rained heavily in Texas while out of town. I removed the cartridge and cleaned it and reinstalled starting the pump. WIthin 10-mins the PSI was between 25 and 30. I thought something may be wrong with the pump so I removed the cartridge and ran the pump without it. WIth no cartridge the pump PSI did not go above 5-8 (ran for 30mins).. I reinstalled the cartridge and again the PSI jumped to 30. What am I missing? All together since I purchased the new cartridge (Pleatco - PAP200) it has been in the filter for less thatn 45-mins but with high PSI.