A thunderstorm just filled my pool most of the way up the tile. It needs to be shocked as well and it occured to me that I could fill it up above the tile and shock the ba'jesix out of it (20ppm.) My thinking is that it will bleach the grout while I put my feet up and drink beer.

The "Normal" chlorine level of 3ppm has already done a good job of bleaching up to the new fill level.

Can anybody see a good reason why I shouldn't do this? It's supposed to be warm and dry here for several days, that alone will bring it back down to the normal fill level..