I have acquired an IBC that formerly conatined Adblue - an aqueous urea solution used to thin diesel to reduce nitrogen emissions or some such. It is about 30% solution of, presumably pig urine or something similar, and classified as non-toxic. It had been pressure washed before I got it and I shall perssure wash it again with a detergent and thoroughly rinse it. Anyone see any reason why I shuld not use it to harvest rainwater for giving my pigs as drinking water?