Quote Originally Posted by aylad View Post
There is a product called "Yellow Out that is supposed to help with mustard algae, but the feeling around this forum (and from Ben....wish I could find the thread he wrote, but that was several crashes ago) that the Yellow Out treatment creates more problems than it solves.

Janet
Ben has some things to say about it here about halfway down:

http://www.poolsolutions.com/tips/tip40.html

Products like this are really only useful in pools with high CYA because they take the CYA out of the equation temporarily.