I'm just finishing the first month after a pool remodel in which I switched from a SWG to non-SWG pool, and replaced white plaster with a PebbleTec MiniPebble finish. My chemistry has been pretty good - much improved after ditching my test strips and buying a Taylor K-2006 kit. PebbleTec recommended some fairly tight limits on the various parameters, but those have opened up a bit since exiting the startup phase:
You can see that their recommended levels are a little different than TFP: pH is lower, TA is similar, CH is lower, and they use LSI instead of CSI, at much tighter limits.
Today, my test results (current water temp = 53 F) were:
My question is: Since everything except LSI/CSI is in range, and only CH is at the lower end of that range, should I add calcium chloride (~24 lbs) to bring CH to 250 and bring CSI closer to 0 (-0.41)? Or should I leave well enough alone?
| Free Chlorine | pH | Total Alkalinity | Calcium Hardness | Total Dissolved Solids | Cyanuric Acid | LSI |
| 1.0-3.0 | 7.2-7.6 | 70-100 | 150-300 | 400-800 | 20-30 | -0.3-0.3 |
You can see that their recommended levels are a little different than TFP: pH is lower, TA is similar, CH is lower, and they use LSI instead of CSI, at much tighter limits.
Today, my test results (current water temp = 53 F) were:
| Free Chlorine | pH | Total Alkalinity | Calcium Hardness | Total Dissolved Solids | Cyanuric Acid | CSI |
| 2.0 | 7.4 | 90 | 160 | Unknown | 33 | -0.58 |
My question is: Since everything except LSI/CSI is in range, and only CH is at the lower end of that range, should I add calcium chloride (~24 lbs) to bring CH to 250 and bring CSI closer to 0 (-0.41)? Or should I leave well enough alone?
