I drained half my pool and added 8,000 gallons to refill. I cleaned my Filter, added DE, and have gotten my chemistry close to where TFP recommends:
FC: 9.5
pH: 7.5
TA: 150
CH: 450
CYA: 90
CSI: 0.30
Just yesterday, I noticed an accumulation of "white stuff" in my hot tub. It is no DE...