- Scaling on the swimming pool tiles.
- Scaling on interior finish of the swimming pool.
- Scaling on spillways, and decorative water features.
To accurately test calcium hardness, you will need to purchase a drop based test kit. Using a drop based test kit to titrate will give you the most accurate measurement of calcium in your pool water.
Do not confuse calcium hardness with TDS, as calcium is only one component of TDS. A drop based test kit will have a pronounced color change once you achieve the end point, providing the true calcium hardness level.
When calcium levels are too high in a swimming pool it is recommended to drain the pool. Any time you remove water from a swimming pool you run the risk of ruining the interior finish.
Reverse Osmosis (RO) filtration lowers calcium levels and is by far the most effective way as the water levels in the swimming pool don't change.