I've been trying to get rid of these stains from my pool for quite some time now and am unable to get rid of them! Its extremely frustrating.
As background, I have tried regular green algae algaecide, silver based algaecide and super chlorinating the pool with liquid chlorine. These stains will not budge!
The only way i've been able to slightly get rid of one of the stains is by laying a trichlor puck right over it over night. However the stains or algae has fanned out from the steps to lightly cover 1/4 of the pool bottom.
Brushing does not seem to have any effect on it, even taking my nail and trying to scrape it off didnt do much of anything.
I am assuming this is what is considered "Pink Algae" however, I see people refering to it as Pink slim and it does not feel slimy at all.
Unfortunately right now I do not have a test kit to post any numbers up, however if needed I'll local pool supply place to give me the numbers.
This is super frustrating and ugly, any help would be much appreciated.