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When calcium hypochlorite (BioGuard Burn Out) is added to a pool as a shocking agent, the calcium hardness level is increased. This increase is caused by the addition of calcium ions from the calcium hypochlorite molecule itself as well as from other salts of calcium present in the mixture.

When using Burn Out, the calcium hardness level will increase approximately 0.4 ppm for each 1 ppm of chlorine added. This means that the biweekly shock with Burn Out to level of 8 ppm chlorine will increase the calcium hardness about 3 to 4 ppm for each addition.

 

PPM CHLORINE ADDED

PPM CALCIUM
HARDNESS INCREASE

1
5
8
10
20

0.44
2.2
3.5
4.4
8.8
The above information is supplied by Bio-Lab and represents its best interpretation of available technical information at the time of preparation. The sole purpose is to supply factual information to Bio-Lab customers. It is not to be taken out of context nor used as support for any other claim not made herein.