CSI level. Understanding the chemistry and help balancing.

[mconnell]

I am coming off a SLAM for over a week for mustard algae.

FC 15
CC 0
OCLT 0
pH 7.5
TA 70
CH 400
CYA 80
Temp 56F
Salt 3300
csi calculates at -0.57

Based on my pool type and TFP recommended levels, the chemistry looks good considering a long SLAM. My Question is why is the csi at the lower level? What should I change to increase the csi? Should I change anything?

Thank you in advance for any and all advice.

MC

 

[ajw22]

Cold water temperature reduces the CSI. Let your pH drift up to 7.8 to 8 until the water warms.

 

[mconnell]

Cold water temperature reduces the CSI. Let your pH drift up to 7.8 to 8 until the water warms.

That's what I was thinking just wanted to be sure I wasn't missing something.

 

[Jedisparky]

I'm in the exact same position. I was playing around with the Pool Math Calculator last night and realized as I brought up the water temp in the equation the CSI balanced out to a good range. That's why I'm reading these CSI threads to understand how it works. This site is awesome.

Michael