What is this and how to get rid of it !!!


New member
Oct 27, 2019
Senatobia, MS
First time pool owner here I've got a few pictures of this reddish pink stuff that is stuck to the bottom of the pool I've brushed it with a wire brush to no avail and shock if it touches it seems to turn it white but then there is still a white spot on the pool I've done the vitamin c test and it doesn't take it off ... it's a 40000 gallon pool with a salt system I can post my chemical reading when I get home if needed 20191027_113337.jpg20191027_113353.jpg


Bronze Supporter
Apr 27, 2018
Midland, MI


TFP Expert
LifeTime Supporter
May 3, 2007
Pleasanton, CA
I think that might be pink algae which is actually a form of bacteria. Follow the slam procedure in the link above. What are your target CYA and FC levels?