Cannot raise CYA

[mas985]

Today's test results from pool store:
FAC - 1.5
TAC - 4.5
Salt - 3,000
CYA - 70 - It's coming-up!!!!!!
TA - 120
pH - 8
Acid - 2
Pho - 0

That is a red flag. There is something in your pool causing high CC. This is what is using up your chlorine. It could be the same thing that is consuming your CYA as well. You need to shock the pool and keep it at shock levels until FC equals TC and FC holds overnight.