It's been 5 months since we filled our new pool. Since then CH has been rising, which i gather is normal for a concrete pool. However, I tested my water the other day and these were the results:
The CH has risen by 100 since I last tested a month or so ago. We have had some hot weather recently and i have topped up the pool with water a couple of times since testing, our tap water has CH of 60. Is it possible that the fill water could have contributed to the rising CH that much.?
I should say also that when i brushed the walls the day before doing the testing, a bit of dust came off the walls so I wonder if the calcium could be leaching from the walls? Also i noticed a small amount of white crusty build up in placed underneath the coping. We have an automatic acid feeder so the PH doesn't usually rise that much but i don't know how much acid it's putting into the pool though....