Chlorine and calcium low

[mrszaff]

sodium hypochlorite,12.5%
21000 gallons in ground vinyl
I will test it again in the am and add more if needed.
keep you posted
thanks again

[aylad]

In 21K gallons, 1 gallon of 12.5% should have raised your FC by 6 ppm. I would definitely test again in the morning and add more to get back up to at least 8--and I would probably shoot for 10, just to be safe.

Janet