Calcium hardness level

[datadr93]

I'm very confused.

PoolMath shows a very high ideal range for calcium. Looking at Taylor and other table sources, the ideal range for fiberglass pool is well below what PoolMath is showing.

My calcium for fiberglass pool is 210. I'm hesitant to add more calcium.

 

[PoolStored]

Your calcium is just fine. The recommendations are for a broad set of pools. Some FG pools have a tile waterline, so calcium is important. If you don't have a tile waterline, or gas heater, calcium in not needed.

Here are the general recommendations...

What Are My Ideal Pool Levels?

Use our tool to find ideal chemical levels for any swimming pool. Check TFP recommended levels on pH, free chlorine, cyanuric acid, and more.

www.troublefreepool.com

 

[datadr93]

Your calcium is just fine. The recommendations are for a broad set of pools. Some FG pools have a tile waterline, so calcium is important. If you don't have a tile waterline, or gas heater, calcium in not needed.

Here are the general recommendations...

What Are My Ideal Pool Levels?

Use our tool to find ideal chemical levels for any swimming pool. Check TFP recommended levels on pH, free chlorine, cyanuric acid, and more.

www.troublefreepool.com

Thank you for the input. We did just have the apron completed over last few days and I've been fighting the alkalinity with all the concrete spill-over into the pool. After 2 days, we're back to crystal clear water. Calcium prior to the apron was 200... and waited for other chemistry to be resolved and then re-tested the calcium to see how much the concrete that fell into the pool impacted the hardness.

Granted, with the Taylor test, maybe it was only 200... interpretation of blue color 'could' have been 200... but 210 absolutely blue color.