Construction is over! You regain your backyard and it's time to enjoy your new swimming pool. It is also time to keep up with the maintenance that your pool builder recommended at startup.
Are you aware of the importance of maintaining proper pool water chemistry?
Not maintaining the proper levels on your pool water will cause the PH to raise and create calcium on the other hand adding too many chemicals will damage the surface of the plaster and compromising its waterproof. Resulting, after extended periods of time, in the deterioration of plaster and the shell itself.
The spa in the upper picture is stained with black spots. The picture below shows the stains removed.
When the PH of a pool or spa is not maintained at an ideal 7.4 other water particles will bond to the plaster surface resulting in permanent damage to the plaster.
If you have a pool service professional, talk to them. Educating yourself on how to keep up with the water in your pool, will help you maintain your investment.