Will adding Calcium chloride increase the salt level as read by my SWG?

[Tbefi1]

Latest chemistry: FC = 7.5, CC = 0, PH = 7.7, TA = 75, CYA = 40, CH = 225, salt = 3100, temp = 68, CSI = -0.36 (pool math).

Based on this I need to raise the CYA and CH.

My questions:

1 - Will my salt concentration as measured by my SWG sensor increase when I add 35# CaCl? If yes, is this 'useful' salt to the SWG or will I need to recalibrate it?

2 - Once I increase CH to 350 and CYA to 70, my CSI according to Pool Math will be -.25. Is this a good CSI? The biggest lever to get CSI closer to zero is to raise PH, but that is bad for the SWG and also swimmers eyes. BTW if I decrease PH to 7.5, the CSI goes to -0.43 which is getting close to the -.6 limit. What is the correct CSI to shoot for?

Thanks!
Tony

 

[JamesW]

50 lbs calcium chloride is approximately equal to adding 40 lbs sodium chloride.

A pH of 7.8 is usually a good choice.

A CSI between -0.3 and 0.0 is usually a good choice.

 

[Tbefi1]

Thanks James! Just so I am clear, will the SWG actually use the CaCl effectively?

 

[JamesW]

Thanks James! Just so I am clear, will the SWG actually use the CaCl effectively?

Yes, the chloride is what matters.

 

[JamesW]

Be careful about overdoing the calcium. If your fill water is high in calcium, the level will rise with evaporation and refill.

Also, as the water warms up, the CSI will go up. So, plan for the highest water temperature that you will get.

 

[Tbefi1]

Great advice, thanks! I will bring the CH to 300 and let it naturally rise from there. I was not thinking about the temp rise on the CSI so thanks for that! My pool is well shaded but will still easily get to the 80's in the summer.