The water is crystal clear. However, i have this algae that kind of looks like rings (see attached pictures). Any thoughts on what it is and how to treat it?
Algae (I think) but not green algae
- Thread starter bobmano
- Start date
Welcome to the forum. 
Are you talking about the many "blotches" sort of ring-like in the pic? If so, does it brush away?
Are you talking about the many "blotches" sort of ring-like in the pic? If so, does it brush away?
Welcome to TFP!
It looks like regular old green algae to me.
This is how we kill algae, SLAM Process
It looks like regular old green algae to me.
This is how we kill algae, SLAM Process
I tried and it doesn't brush away.
Welcome to the forum.
Are you talking about the many "blotches" sort of ring-like in the pic? If so, does it brush away?
If you cannot get it to brush off with some pretty vigorous brushing, it is likely calcium scale which is harboring some green algae. You have to identify it before you treat it. If it's calcium scale the blotches should be "humped up" a little bit so you can feel them when you run your finger across it.
If so, see if you can scrape some off with your fingernails and retrieve what you scraped off.
Out of the pool (and being dry wouldn't hurt), place them on some unvalued wood and put a few drops of muriatic acid on them. They should "fizz up" quite noticeably. That will show us it's calcium.
We really need to see CURRENT pool test results, too, please. Can you post them?
If so, see if you can scrape some off with your fingernails and retrieve what you scraped off.
Out of the pool (and being dry wouldn't hurt), place them on some unvalued wood and put a few drops of muriatic acid on them. They should "fizz up" quite noticeably. That will show us it's calcium.
We really need to see CURRENT pool test results, too, please. Can you post them?
It kind of looks like the plaster is worn down to the gunite.
Has the plaster been acid washed?
Has the plaster been acid washed?
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