I tested my pool pilot nano + today after finding zero chlorine in the pool. Salt 3400PPM, temp 87, duty cycle was 50% (bumped to 75%), and running 8 hours (4hrs morning, 4 hrs night). Cell is pulling 4.9 amps. 4600 amp hours life on the cell.
FC 9.0 (had pucks floating for vacation)
Added 4 lbs CYA, and 25 pounds calcium
Water is still clear. Did pool math and added 121oz of clorox and threw my tri-chlor puck floater back in.
My next idea is to pull the cell and check for build up. It's on it's third season and I checked it last summer and the plates were clean.