Saltwater plaster pool

[Kurtski]

OK, It’s our 4th swim season in south Texas. I’ve recently cleaned our “Pentair Intellichlor” and added salt. The water is clear, and testing good however today I needed to bring PH down and shock.

I’m looking for answers to remove some small spots that are appearing here and there on the plaster.

They are dark and remain intact even after brushing. (I can scrape them with my fingernails or a brass brush.)

 

[pjt]

I’ve recently cleaned our “Pentair Intellichlor”

Hopefully not with a MA bath, which shortens the life of the cell. Do you know the cause of the cell contamination?

testing good

How are you testing?

I needed to bring PH down and shock.

What's the pH? Do you have algae/cloudy water/CC/failed OCLT?

I’m looking for answers to remove some small spots that are appearing here and there on the plaster.

Can you post pictures?

 

[Texas Splash]

Welcome to TFP! A full set of test results would be our first step. When you scrape that stuff, have you tried rubbing it onto a paper towel?

Black Algae

This guide provides a step by step procedure for eliminating black algae in your concrete or gunite pool. Read full post here.

www.troublefreepool.com

 

[Kurtski]

Welcome to TFP! A full set of test results would be our first step. When you scrape that stuff, have you tried rubbing it onto a paper towel?

Black Algae

This guide provides a step by step procedure for eliminating black algae in your concrete or gunite pool. Read full post here.

www.troublefreepool.com

OK so we put on a mask and snorkel and used a small brass brush to break up the spots, we then shocked and circulated extra for a few days. Seems that cleared up the problem.

 

[Kurtski]

Welcome to TFP! A full set of test results would be our first step. When you scrape that stuff, have you tried rubbing it onto a paper towel?

Black Algae

This guide provides a step by step procedure for eliminating black algae in your concrete or gunite pool. Read full post here.

www.troublefreepool.com

I never tried rubbing it on a paper towel but could have I'm guessing. What would that show/prove? Again this is our fourth summer and have had little problems with keeping water perfectly clear and clean. I usually use only a simple test strip, watching for high Ph and low cholerine. I have used MA to clean the salt generator more than once. and I'm bad about cleaning filters. It might be time to replace the filters because of that.

 

[Texas Splash]

What would that show/prove?

The smeared color on a white paper towel tends to help confirm if it's Black Algae or something else.

I usually use only a simple test strip, watching for high Ph and low cholerine.

You'll see test strips give very broad ranges of what they consider acceptable. Not only are the strips sensitive to changes, but the ranges are just that - wide areas and not accurate at all. This is why drop testing with a TF-100 or Taylor K-2006C is so important. A good test kit costs a few bucks more now, but pays for itself over the season by saving you time, money, and products in the water.