I'm in the Houston area as well. Couple of quick comments. I'm very surprised to hear that your bleach demand is so low. I use the standard 8.25% concentration and my bleach demand varies widely from summer to winter. I have a 19K gal pool and in the winter, I might only add 20-30 oz/day whereas in the summertime, I add anywhere from 50 to 100+ ounces per day. Of course the amount depends on my CYA level, but I try to keep that around 40. Additionally, I've read that heat can degrade liquid bleach quickly. For that reason, I'd be concerned about storing such a large quantity outside in the Texas heat.