CH very high

[Bangotwango11]

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Beth’s pool
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Build Type: Vinyl
Volume: 14500 gallons
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Latest Test Result Summary:
FC: 2.0 (an hour ago)
CC: 1.0 (an hour ago)
pH: 7.8 (an hour ago)
TA: 200 (an hour ago)
CH: 550 (an hour ago)
CYA: 0 (an hour ago)
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Given that my CH is so high I’m assuming the scale in my vacuum is calcium deposits? There are areas in the liner that it is stuck on. Won’t come off with brush. Working on my CYA now to get it correct. Will that help loosen it up or is there another product I should try?

Test Results 06-03-2019 @ 03:58 PM
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Free Chlorine: 2.0
Combined Chlorine: 1.0
pH: 7.8
Total Alkalinity: 200
Calcium Hardness: 550
CYA: 0

 

[mknauss]

Welcome to the forum!
With elevated CH you must learn how to manage your water using CSI - Calcium Saturation Index (CSI) - Trouble Free Pool. Keep it between -0.6 and 0.3. Poolmath calculates it.
I would suggest a Overnight Chlorine Loss Test as it appears you may need to SLAM Process based on low FC and high CC.
I suggest you read ABC's of Pool Water Chemistry and consider reviewing the entire Pool School eBook.

 

[Flying Tivo]

The problem is you have a high CSI 0.73, that is your issue.

 

[Bangotwango11]

I was playing with the CSI calculator on the app. I will perform the overnight chlorine loss test and see what I come up with. I noticed that CYA had a significant impact on the CSI number. That combined with the correct PH should get my CSI lined up.

 

[mknauss]

TA and pH have a large impact on CSI.

I would suggest you drop your TA to under 100. See Lower Total Alkalinity - Trouble Free Pool