Black spot in the pool?

golfguy21

Member
Jan 15, 2019
9
Morgan Hill
All - thanks for taking the time to read this. I recently noticed a few small black spots that would not brush off when cleaning. They are about a quarter size and only in one corner of the pool. I know black algae can grow from not maintaining a balanced pH level but is this what it is...black mold? The water is currently balanced. The water and pebble tech in all other corners of the pool is clear and spotless. Any advice on how to remove and prevent would be greatly appreciated. Thank you!
 

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Bperry

Gold Supporter
Aug 20, 2020
994
Knoxville, TN
Pool Size
27000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-60
All - thanks for taking the time to read this. I recently noticed a few small black spots that would not brush off when cleaning. They are about a quarter size and only in one corner of the pool. I know black algae can grow from not maintaining a balanced pH level but is this what it is...black mold? The water is currently balanced. The water and pebble tech in all other corners of the pool is clear and spotless. Any advice on how to remove and prevent would be greatly appreciated. Thank you!
Really hard to see the black spots in the picture. What are the current FC, pH, etc readings?

Btw, I used to live in Morgan Hill, ~12 years ago. Kinda miss it sometimes.
 
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