high cc

[swirlywater]

My CC=0, FC will be over 12 tonight. Since I started this SLAM my pump pressure has slowly been going down. It was running a bit higher this year than last year and is now at 18 which I think is good. Could the pressure lowering be caused by algae getting cleaned out of the filter from the week of shock level chlorine?

 

[jblizzle]

The pressure should be going up as stuff is trapped.
How often are you having to backwash (when the pressure rises 20-25% over the clean pressure)?

 

[swirlywater]

My OVCLT loss was .5 and my CC=0 so I am going to call this SLAM done!! When the FC drops to normal I will recheck my PH, TA, and CYA. When I first opened the pool, cleaned the filters in the fall at closing, my starting pressure was 22 and I had to backwash after about 2 hours, then again the day following. There was a bit of stuff that settled on the bottom of the pool that was unsettled when i brushed and vacuumed. Last year my post backwash pressure was around 16 (12 after the pool was installed, but I never got it that low again). After the first two backwash's this year my pressure stabilized at 22. When i started the SLAM it dropped to 21 for a couple days and now has been holding at 20 for a couple days. The pump has been running 24/7 for 12 days. The water is crystal clear and doesn't look any different even after brushing because i have been doing it every day. I am not overly concerned about the pressure but want to ask the experts.

Thanks to everyone here who helped me get through my first pool opening!!!