Calcium Hardnes, Total Alkalinity and Ph high

[Deeclay2]

Hello,
I just got the TF 100 test kit and tested my pool. The results are as follows,

FC 7.5
CC 0
Calcium Hardness 550
Total Alkalinity 220
CYA 60
PH 8.2, I keep lowering the PH with dry acid but it keeps rising back up.

According to pool math I must drain pool by 1/3 and add 78 oz of dry acid.


Is there any other way to adjust pool parameters without draining?

 

[mas985]

Welcome to the forum!

I regularly deal with high CH and TA because of our fill water. It is possible to maintain a pool with high CH and TA but you will need lots of acid to do it. I would target a PH of 7.2 until the TA comes down to a more reasonable level which it will over time. However, you might want to use muriatic acid instead of dry acid because it will be more economical.

If you want a quicker process, you can try this: Pool School - Lower Total Alkalinity

 

[YippeeSkippy]

Do you have any idea how your CH got so high?

I ask because my fill water here in Georgia is only about 45ppm of calcium.

Don't worry about calcium in a vinyl pool- it doesn't need it. :cyclopsani:

Yip

 

[Deeclay2]

hi,

Well I went to the local pool store three times this summer and the pool guy kept giving me buckets of calcium hardness for the pool. I thought it was strange but I just went with it as I hadn't found this site yet. I drained some water today....not 1/3 but as much as I could. I am adding the 78 oz of dry acid and leaving it pump all night. I will check again in the morning. I'm so glad to find you guys.