I have a relatively new pool with a BeadCrete interior, and BeadCrete curing process requires the calcium hardness to be held at 150ppm for the first 12 months.
For the 1st month, the pool was on liquid chlorine and I was able to test CH accurately and consistently using a titration kit from a company here in Australia. With this I was able to raise the CH to 150ppm.
After the 1st month, the pool was changed to magnesium minerals with a chlorinator cell. (This was always the plan.) After the change, the CH titration test wouldn't work. Instead of starting red and switching to blue, the solution would start purple, and no amount of reagent would give a change to blue. I then purchased a Taylor K-1770 CH kit which claims to be able to work, despite the presence of magnesium. This kit also fails in the same way - it starts purple and never changes to blue. I've read a few of the threads in these forums, but none specific to the K-1770 kit.
Any help would be most appreciated.
For the 1st month, the pool was on liquid chlorine and I was able to test CH accurately and consistently using a titration kit from a company here in Australia. With this I was able to raise the CH to 150ppm.
After the 1st month, the pool was changed to magnesium minerals with a chlorinator cell. (This was always the plan.) After the change, the CH titration test wouldn't work. Instead of starting red and switching to blue, the solution would start purple, and no amount of reagent would give a change to blue. I then purchased a Taylor K-1770 CH kit which claims to be able to work, despite the presence of magnesium. This kit also fails in the same way - it starts purple and never changes to blue. I've read a few of the threads in these forums, but none specific to the K-1770 kit.
Any help would be most appreciated.
