Calcium Hardness

[Gofrogs727]

Calcium hardness tests out at 250ppm (using Taylor 2006K). All other ranges are good.

Pool is located in North Texas where we get a ton of sun. TFB "ideal" CH ranges is 350-550ppm for a plaster pool. But I have also seen in some of the comments that if your pool gets a lot of sun that CH will rise naturally on its own. Is that the case? Or should some to raise it to 350ppm?

 

[mknauss]

Please post a full set of test results.
If your fill water has calcium in it and you use fill water due to evaporation, your CH level in your pool water will rise over time. If you have a lot of rain and over flow from the pool due to it, your CH level in your pool water may fall.

 

[Gofrogs727]

Please post a full set of test results.
If your fill water has calcium in it and you use fill water due to evaporation, your CH level in your pool water will rise over time. If you have a lot of rain and over flow from the pool due to it, your CH level in your pool water may fall.

Got it. Here you go sir.

FC 6
CC 0
PH 7.4
TA 70
CH 250
CYA 50-60

 

[mknauss]

Your CSI is on the low side I suspect. Are you tracking that?

How are you chlorinating?

 

[Gofrogs727]

Your CSI is on the low side I suspect. Are you tracking that?

How are you chlorinating?

CSI per the pool math calc is -.036

Using liquid chlorine for now since my CYA was elevated last month due to the 3 inch tabs.

 

[Gofrogs727]

CSI per the pool math calc is -.036

Using liquid chlorine for now since my CYA was elevated last month due to the 3 inch tabs.

correction, CSI is -.36

 

[mknauss]

ok -- you do not want that to go any lower.

You could switch to using cal hypo to chlorinate for awhile if you wish. Or add some calcium to get to 300+.

 

[Gofrogs727]

ok -- you do not want that to go any lower.

You could switch to using cal hypo to chlorinate for awhile if you wish. Or add some calcium to get to 300+.

Got it. I'll add some calcium to bump it up. Thank you!

 

[Gofrogs727]

Just did the math, if I add 16 pounds of calcium, then my new CSI would be .07

Much better. Thank you again!