5 things you have to know about German guys: 1. They are responsible. Of course Iâm generalizing in all of these points. But every generalization is partly true. They like having fun, but only when itâs appropriate. If you come from Latin lands and shout when talking, youâll scare him.
The ideal range for calcium hardness is 250-350 ppm. If the calcium hardness is too low, the water becomes corrosive and results in the etching of the pool's surfaces. Metals corrode - and this includes pool equipment, pipe fittings and pump connections. As a result, the pool's walls and floor can stain.
With low calcium hardness pool water, you can expect problems with: 1  Pitting of concrete or stone pool decks. 2  Grout dissolving, turning gritty and fragile when you run your finger over it. 3  Pitting on concrete pool walls.  Etching or delaminating of plaster-lined pools.