If you searching for “how to remove calcium from pool tiles” or “how to remove calcium scale from pool tile“, this pool tile cleaning guide should help?
Today we will talk about calcium scale, as a form of calcium carbonate, also called lime scale. Most of the US has hard water which can cause calcium deposits on the surface of the pool.
What causes scale in a pool?
Calcium carbonate can form due to evaporation increasing during summer months around the waterline.
Calcium crystals can form as a nodule which will dot the plaster or metal surfaces or cause crusty deposits in the corners.
The cause of this is the result of high calcium hardness which is triggered by high pH, high water temperatures, and high alkalinity.
How you can prevent calcium scale?
- Using a clarifier to clump the calcium together to be filtered with the pump.
- Balance the LSI (Langelier Saturation Index). That is what determines the propensity to scale. A Pentair LSI calculator will accept 5 water test results and does the math for you.
- Keep the alkalinity and pH low by having 80ppm alkinity and 7.2-7.4 pH.
- Avoid using calcium hypochlorite shock, which adds calcium to the pool.
How you can remove the calcium scale?
You can remove calcium scale with a dry acid that has been dissolved in water or muriatic acid. A sponge works great in smaller areas or watering can for a larger area. Be sure to use safety glasses and gloves for acid removal of scale. It will bubble, emit noxious fumes, and fizz as it dissolves scale. Acid Magic can be used as well.
Calcium Deposits On Your Pool Tile:
Lower your water level to the bottom of the tiles and prepare the acid solution and apply with a thick brush or sponge. A wire brush or putty knife can help to remove scale deposits. Rinse after 1 minute with water, and reapply if needed.
Using a pool or pumice stone can help to remove scale from your pool with some elbow grease.
Hiring a bead blasting service to come out and remove the calcium on your pool tiles. Most are using magnesium sulfate, which is a form of salt that is less aggressive than sand or bead blasting.
Calcium Deposits On Your Pool Plaster:
Most white plaster pools will have calcium deposits all over, but you won’t notice because the surface is white. Gray or black plaster pools will have calcium films, but it will be noticeable. Darker colors can be restored by acid washing.
To remove the calcium from the surface, start with a Pool Stone and see if you can do your whole pool, by sanding off the calcium. Or you can drain your pool, and pressure wash or acid wash the pool.
Calcium On Efflorescence on Stonework and tile:
Similar to calcium scale that comes from water, efflorescence comes from the grout between stones or tiles near a water fixture.
Whatever causes the moisture coming from behind the stone or tile through the grout joints will bring calcium. This is the same process that creates stalagmites.
Sometimes the moisture will come from the pool. A sealer can be used on the tile to provide a barrier. For larger tile or stone above the water, preventing efflorescence may need sealing the water sources behind them.
For those of you who have hard water through the tap, you have my deepest sympathies.
Even with hard water, you can prevent and control calcium deposits with a good water balance, a little elbow grease and some cleaning agents.