Quote Originally Posted by chem geek View Post
I'm unclear about something. The HTH Spa Non-Chlorine Oxidizer Tablets that were added are potassium monopersulfate (MPS), not bromine or bromide.
@ Chem_Geek: Thanks for catching that, Chem_Geek. I didn't follow the link -- I just saw that they were tablets and assumed that it was bromine. So that's new info for me, that MPS is being formed into tablets. I see why he THOUGHT they were bromine: apparently they are intended as a MPS + bromide spa system, and are labeled that way.

@ Matthew: The fact that you do NOT have bromine means you can try that, as an option. Adding 1.5 ppm bromide to your pool -- 1/8 of a 2# bottle -- might help. If you want to try it, here are a couple of links:
Nava Chemicals 652072097 Yellow Algae Remover, 2-Pound Bottle @ Amazon
Tropi Clear TC-4402-1 2-Pound Yellow Eliminator @ Amazon
It might be a good thing to try, even if you do drain. Adding the bromide before you drain might allow you to get a lot of it cleaned up, BEFORE you drain. Using it in conjunction with the foamy algaecide might well allow you to eradicate it, and then remove 50% of the algaecide and bromide, so it wouldn't take to so long to get rid of them otherwise.