Platinum,

We really recommend that new users spend a good bit of time reading through the forums so that they learn what we're all about before posting answers to questions. For example, we generally do not recommend algaecides except for polyquat, and even then only in certain instances. In most cases, the use of algaecides, if one doesn't understand what it's doing to the pool water, can actually make problems worse instead of better. This poster can kill the mustard algae by shocking to a very high level and holding that level until the mustard is gone, but first she must get a test kit that will measure chlorine levels that high. Please take some time and do some reading....

Thanks