I bought 3 25lb bags of 100% pure Boric acid from DudaDiesel. I have 1/2 of a 25lb bag left. Where can I store it? I have an outdoor plastic shed with DE and MA, each in a separate plastic tub with lid. Can I store it there? I live in Texas and it gets easily over 100 in that shed. Please advise. My other ideas would be garage?