Famous Chlorine

[gfritz1]

Received my call on Friday from the sample sent in to have a chlorine demand test completed by Par Pools . The numbers matched up pretty good with mine as they had PH of 7.1 FC 0 CC 0 Alkalinity 186 and CYA of 80 . They tested the city water and the good news it is acceptable to use as fill. Their analysis shows a severe chlorine demand and a calculation of 78 lbs of shock would be needed. So like a few messages back the recommendation is to do the partial drain. Started yesterday. Hopefully can start refilling today . Will post .

Will attempt to suck back liner when level is down to see if wrinkles can improve

[CarlD]

I would NOT drain more than half your water if your CYA is 80. It will leave you with a CYA of 40 which is FINE for the summer. Check "Ben's Best Guess Table" and you'll see that at CYA 80 you need to shock your pool at 20ppm. At CYA=40 you'll shock at 15ppm.

Don't use their "shock". It will either raise your calcium levels far too high (Cal-Hypo) or lower you pH far too low (Di-Chlor)-you are currently at the best level for fighting algae at 7.2. Stick to bleach or Liquid Chlorine which are both pH neutral.

Don't worry: You'll get there!