Ok....So, things are looking good for me as far as the pool is concerned. That being the case, I still have the filter issue which is why I'm returning to this thread.

While my filter does last much longer than before, it still builds pressure quickly. Within 2-3 hours after a complete drain and new DE added, it hits 22 PSI.

Here's the weird part. I can get the pressure to drop to acceptable levels by turning off the pump and opening the air relief valve. When I stop hearing air moving from the relief valve, I'll close it and turn the pump on. Pressure ussually drops to an acceptable level. The drop in pressure will be even more significant if I keep the pump off for a couple of hours before restarting it.

(I'm not certain if the opening the relief valve has anything to do with it or not but I've made it apart of my routine).

I repeat this as many times as I can. As long as pressure drops, I let it run. When it stops dropping after doing the above, then I do a bump and drain.

What do you guys think? Is something wrong with my filter?