15000 Gal, gunite, Mineral Springs, BioGuard (Goldline) SWG, DE filter, negative edge and waterfall on separate pump and separate cartridge filter. Water looks very clear. Never an algae problem. Corrosion on nearby metal fence.
CL Residual: 3+ (Always high. I had CL generator turned down to 40%. Went to 30% today. I never shock. I never add chlorine)
PH: 8.2+ It’s always high.
Acid demand test: One drop. Chart calls for a bit more acid. I’ve been adding acid every week, trying to bring PH down.
TA: 60 (six drops) Always low.
CYA: 33 A bit low?
Salt: 3400 (compromised estimate. SWG readout says 3300. Test strips say 3500)
Is low TA my biggest problem? If so, should I add baking soda? How much should I start with?