Will be closing in a week or two. Noticed that pH has been rising lately… currently around 8. However, I also noticed that as water temp drops the Pool Math calculation for CSI also goes down. So… should I just leave pH at the current level and not adjust? CSI currently at .17 with pH at 8 and water temp at 68. Temp of 40 will drop CSI to -.1. What is the lowest water temp I should enter to get accurate CSI for winter water temp? Thanks.