My refurbished IG gunite/plaster pool was refilled with tap water at the end of April. At that time, the PB tossed in a starting dose of CYA stabilizer. CYA started out at 30.
I've been using a hybrid approach of 10% liquid plus trichlor 3" pucks to add Cl, mostly because I bought the pucks just before I learned about TFP. When the FC needs a goose, I dump in the liquid. The rest of the time, the pucks sit in a floater. I figured once my CYA rose to 40, I'd quit using the pucks routinely.
It is now late July, and my CYA is still 30.
I believe I'm doing the test correctly. My test equipment is clean, my reagent is fresh, and there's no ambiguity with the black dot. Back to sun, waist level, etc. At 40, the dot is visible. At 30, it's gone.
How is this possible? Everything I read here says pucks will cause CYA to rapidly rise. In this case, I want the CYA to rise.
Today's test results follow. After this reading, I added 3 more pucks to the floater.
FC 2.0
CC 0.5
pH 7.4
TA 100
CH 330
CYA 30
I've been using a hybrid approach of 10% liquid plus trichlor 3" pucks to add Cl, mostly because I bought the pucks just before I learned about TFP. When the FC needs a goose, I dump in the liquid. The rest of the time, the pucks sit in a floater. I figured once my CYA rose to 40, I'd quit using the pucks routinely.
It is now late July, and my CYA is still 30.
I believe I'm doing the test correctly. My test equipment is clean, my reagent is fresh, and there's no ambiguity with the black dot. Back to sun, waist level, etc. At 40, the dot is visible. At 30, it's gone.
How is this possible? Everything I read here says pucks will cause CYA to rapidly rise. In this case, I want the CYA to rise.
Today's test results follow. After this reading, I added 3 more pucks to the floater.
FC 2.0
CC 0.5
pH 7.4
TA 100
CH 330
CYA 30