Coating on tiles

[DrVetlab]

We had our pool resurfaced with Diamond Brite about 3 months ago. Part of the job was to replace the decorative tile on the steps. I noticed a few days ago that the upper half of the tiles had a chalky like substance sticking to them. I was able to scrape it a little bit using my thumbnail. In all cases the chalky substance is below the water line. Any thoughts would be helpful.

 

[Texas Splash]

Sounds like you may be dealing with scale already. Can you post a full set of water test results? We recommend home testing with a TF-100 or Taylor K-2006C test kit. See the link below for more great info. Welcome to TFP!

Pool Care Basics Archives

Your one-stop shop for all things TFP to include: ABCs of Water Chemistry, Recommended Chemicals/Levels, Test Kits, Troubleshooting, and much more!

www.troublefreepool.com

 

[mknauss]

What was done to resolve the plaster issue you had in your other thread?

 

[DrVetlab]

Sounds like you may be dealing with scale already. Can you post a full set of water test results? We recommend home testing with a TF-100 or Taylor K-2006C test kit. See the link below for more great info. Welcome to TFP!

Pool Care Basics Archives

Your one-stop shop for all things TFP to include: ABCs of Water Chemistry, Recommended Chemicals/Levels, Test Kits, Troubleshooting, and much more!

www.troublefreepool.com

Why would the scale be only on the upper half of every tile on every step? It's like almost a straight line. All of it is below the water line.

 

[Texas Splash]

Why would the scale be only on the upper half of every tile on every step? It's like almost a straight line. All of it is below the water line.

The same question applies to just about any other chemical scenario, so it's too early to tell for sure. If you can collect some of it, put it in a pile and pour acid on it to see if it fizzles. In the meantime, some water test results would help us further.