Matt, I was just comming back to refute my earlier post that cl wouldn't help ( ), after reading what you said here https://poolforum.com/pf2/showthread.php?t=5612. I'm just curious, where does this appear (part of country/ world)? If I've seen it before (Ct), I've misdiagnosed it as 'dirt' and paid it no mind, if I should be 'shocking the BEJESUS out of the pools, I'd really appreciate knowing.
Sorry for any 'bad' info I may have posted on this thread, but I did not know about this type of algae before I saw Matt's post above (though I don't think others had either, perhaps we can call it "Matt's Mud" or "4X4 algae" "