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What do you do if you have clusters of black dots on the surface and bottom of your swimming pool?
Wiki User
∙ 16y ago
I have the same problem, my pool shop suggested getting the acid level to normal (around pH 6-6.5) ensuring stabiliser levels were normal and adding granulated chlorine, I added the choline and it went cloudy (don't add liquid chlorine at this stage) leave it for a week then go back to normal chlorine dosing, the combination of these steps should remove the black spot, mine went to a lighter shade of green but is still there, I may have to repeat the first 2 steps as my pool was out of balance.
Did you try anything else that may have worked?
Ian
Wiki User
∙ 12y ago
Wiki User
∙ 16y agoThat is probably black algae. You need to go to a pool store and have them advise the proper chemical and use of that chemical for your pool. It may take a granular product for white plaster pools. Color tinted pools are another matter and you should use a liquid black algae treatment. And if you have a vinyl liner pool I just do not see how in the world you could get black algae. Black algae comes from not maintaining proper chlorine levels and adjusting the pH.
Wiki User
∙ 12y agowell the balc algae is one the hardest algae to remove.the root can even goes inside the stracture ,i mean through the concrete.the best thing in my opinion ins giving it a shock till 15 ppm and keep using the black algae romover and maintaining the chlorine to almost 7 ppm for a month to see the result.
u may not be able to remove but worht the try
Wiki User
∙ 9y agoFloating black dots in Swimming Pools are black or spot algae. They first appear as small specks on the pool's surface and then multiply rapidly.
Wiki User
∙ 14y agoBlack algae, Very hard to get rid of the sooner you start the better.
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