Low alkalinity not increasing with baking soda

[mcinlb]

The TA in our plaster pool doesn’t seem to want to come back up to a TA of 80-90 where it has been for the past 5 years.

Latest home water test is showing

pH 7.6
TA-60
CYA-50
FC-5 ppm
Salt 3100ppm

Pool is ~12k gallons

I added 56 oz of baking soda, waited 2 days and retested TA which didn’t budge.. still showing ~60

Should I continue to add additional baking soda until it comes back up or can I leave the TA as is?

Thanks!

 

[mknauss]

Leave it. Your fill water has higher TA. With evaporation, you will be adding more fill water.