Guys, Thanks for all the input. The main thing I was worried about was our Texas heat which has hit 110+ on several occasions the last few years. I'm in the aerospace solvents business and I know that heat speeds up the breakdown of some of our organic compounds but don't have a clue if fertilizer would break down into something toxic. The tank (3+ acres) dried up during the last year of the drought so we had to start over again in 2000. Definately don't want to mess it up now over $50 worth of fertilizer! Maybe I'll just use it in the sunflower patch for the doves....