About a year ago I drained the pool and had the tile blasted, because of high CH and scaling left over from the prior owner. My fill CH is about 175. Int the last month my CH has jumped from 575 to 700. According to Poolmath with my 6640 gal pool that is equal to adding almost 7.75 lbs of Calcium Chloride just in the past month?
I don't think it is coming from the fill water, since I know from my water bill that evaporation hasn't really been an issue yet.
The only thing that has changed, is in the last month my pool is now in the sun, and had to increase the salt cell to compensate and also I am having to add acid at about 12 oz every 4 days to keep pH in balance. Water temp has also increased from about 74 to 88 in the past month.
Here are my test results since the day of drain and refill:
Date Calcium
6/12/2016 700
5/6/2016 575
4/24/2016 575
4/15/2016 550
3/24/2016 525
2/28/2016 525
1/20/2016 500
12/30/2015 500
11/15/2015 425
10/10/2015 425
9/21/2015 425
9/5/2015 400
8/25/2015 400
7/22/2015 310
7/14/2015 300
6/23/2015 250
6/20/2015 250
6/11/2015 225
6/7/2015 225
6/1/2015 200
5/25/2015 200
5/23/2015 200
5/12/2015 175
I don't think it is coming from the fill water, since I know from my water bill that evaporation hasn't really been an issue yet.
The only thing that has changed, is in the last month my pool is now in the sun, and had to increase the salt cell to compensate and also I am having to add acid at about 12 oz every 4 days to keep pH in balance. Water temp has also increased from about 74 to 88 in the past month.
Here are my test results since the day of drain and refill:
Date Calcium
6/12/2016 700
5/6/2016 575
4/24/2016 575
4/15/2016 550
3/24/2016 525
2/28/2016 525
1/20/2016 500
12/30/2015 500
11/15/2015 425
10/10/2015 425
9/21/2015 425
9/5/2015 400
8/25/2015 400
7/22/2015 310
7/14/2015 300
6/23/2015 250
6/20/2015 250
6/11/2015 225
6/7/2015 225
6/1/2015 200
5/25/2015 200
5/23/2015 200
5/12/2015 175