added hardness control - Ph dropped

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J

jtblaw1

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May 9, 2010
9
On sunday my ph was 8.0 and my hardness was 140ppm. the pool store computer told me to add 4 lbs of ph down and 25 lbs of hardness control. I added the ph down on sunday night and only 7 lbs of the harness control on monday and another 7 lbs yesterday. Today my ph was 7.2. is there a correlation? What actually is the "hardness control?"
 
The only "hardness control" product I can find is something to raise your calcium hardness; 140 is on the low side so that seems reasonable.

The pH Down is what lowered the pH. There's no real correlation between the pH and hardness adjustments.
--paulr
 
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