I'm not sure if this is black algae or not. Can you walk me through how to tell? Last year I did a poor job of keeping our chlorine levels where they needed to be. I just finished the opening process of fully testing my water, increasing calcium, CYA, lowering pH and getting chlorine up. The water looks great. Any help would be appreciated.
Could it be black algae?
- Thread starter DanaSC
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If you have one take a 3" tablet and rub right on the spot, looks like black algae and if it is the tablet will remove it.
If you have one take a 3" tablet and rub right on the spot, looks like black algae and if it is the tablet will remove it.
How hard and long should I have to rub the puck on it to determine? Is it possible this could be due to low calcium levels in the pool for an extended period of time?
Just enough to cover the spot, you won't see results immediatly but if is black algae it will remove it, Once Black algae gets established it is real hard to remove by normal chlorination. It has a protective cover and it will root into the surface
Just enough to cover the spot, you won't see results immediatly but if is black algae it will remove it, Once Black algae gets established it is real hard to remove by normal chlorination. It has a protective cover and it will root into the surface
Thank you so much. So I should rub it on and leave it be to work on the algae? Is this the best treatment method to get rid of it altogether? We're thinking that sounds tough as there are spots deeper in the pool I think. The other concern I have is my calcium was really low. We normally cover the pool in the winter but didn't this year and I didn't keep calcium where it needed to be. I'm kicking myself. But I'm wondering is it possible that these black spots may be from the calcium being too low for too long, or would that have a different appearance and really most likely this is black algae? Also is it safe to swim if there's black algae? Thank you for the help with my questions.
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