Hi

Took water sample to pool store for numbers check. Here they are:

Free Chlorine: 3.0 good reading
Total Chlorine: 3.0 good reading
Calcium Hardness: 150.0 good reading
Cyanuric Acid: 0.0 below minimum
pH Level: 7.8 good reading
Total Alkalinity: 100.0 below minimum
Copper: 0.0 good reading
Iron: 0.0 good reading
TDS 200.0 good reading

In looking back at my previous sample reports, since 2005, all of my reports have had a "below minimum" on calcium hardness. I have known that, and didn't give it much todo, because I have learned on here that it is not important on the vinyl.

I have only ever added, household bleach, baking soda, borax. I have used the pucks in the inline to raise CYA in the past. To raise the CYA I filled the inline again.

My question is how did the calcium hardness raise? Just curious.

Thanks,
kathy