Brown gunk on the bottom of pool

[rox29160]

I didn't get hardly any rain from Irene, but I got about 1-1/2" Monday after she was long gone, which will probably make my PH and TA worse. I had checked the PH before Irene was supposed to hit just to beat the storm. I've been dissolving the Borax in a bucket of water and then dumping it in the pool, so I don't think it is settling to the bottom or anything.

[Watermom]

You don't need to pre-dissolve the Borax. Just pour it slowly into the skimmer breaking up any clumps.