2nd full season gunnite pool, about 13k gallons. Started a little bad - the guy that closed/opened it left a lot of organics in through the winter. Upon opening it appeared there were a few spots of black algae. At his direction I added 2 bottles of Black Algaetrine Swimming Pool Algaecide & Deposit Control, which is copper based. The spots never went away but it didn’t get worse. Except then green algae did. So I used a few different products (bioguard banish, etc) and it stayed in check.
Then I started getting a pinkish covering on steps/shallow end, I assumed pink algae. Before I went on vacation, shock & 2 more bottles of algaetrine bc I wasn’t going to be here for a while. Came back, pink spots plus green algae still present (not green water, but the white part of swimsuits got green), found this tool & started trying to SLAM the pool to get rid of the algae. I added gallons (like 10) of chlorine over a week & couldn’t get FCL over 4, but it mostly stayed closer to 2 or below.
Ph was 7, so I aerated to get it to 7.4.
My TA was 200
CYA 100 (then down to 30 without changing water so measurement error?)
From various forums, I’m guessing the algicide’s copper precipitated out due to the high CYA and problems with algae?
I also have a stain from the last bag of shock, which did not manage to raise the FCL either.
For now I’ve emptied about half the water, and changing the cartridges for the filter, ordered ascorbic acid. Tried a little citric acid on the pink tonight and it’s not made a difference. (Don’t have vitamin c.) I’ve also ordered the jacks magic ID kit just in case I’m wrong on the copper.
Given it was a “professional” that started me down this path I’m hesitant about consulting others - I checked references so it wasn’t random guy… Ideas? Help? Suggestions? Am I on the wrong path?
Then I started getting a pinkish covering on steps/shallow end, I assumed pink algae. Before I went on vacation, shock & 2 more bottles of algaetrine bc I wasn’t going to be here for a while. Came back, pink spots plus green algae still present (not green water, but the white part of swimsuits got green), found this tool & started trying to SLAM the pool to get rid of the algae. I added gallons (like 10) of chlorine over a week & couldn’t get FCL over 4, but it mostly stayed closer to 2 or below.
Ph was 7, so I aerated to get it to 7.4.
My TA was 200
CYA 100 (then down to 30 without changing water so measurement error?)
From various forums, I’m guessing the algicide’s copper precipitated out due to the high CYA and problems with algae?
I also have a stain from the last bag of shock, which did not manage to raise the FCL either.
For now I’ve emptied about half the water, and changing the cartridges for the filter, ordered ascorbic acid. Tried a little citric acid on the pink tonight and it’s not made a difference. (Don’t have vitamin c.) I’ve also ordered the jacks magic ID kit just in case I’m wrong on the copper.
Given it was a “professional” that started me down this path I’m hesitant about consulting others - I checked references so it wasn’t random guy… Ideas? Help? Suggestions? Am I on the wrong path?
