Been lurking here for several months and never posted anything because I have always been able to search and find the answer to all my questions, however, this one is eluding me. Can I use GSE in a metal water can? I know that Apple Cider Vinegar must not be put in a metal water container due to the acidity, so I put it in a seperate plastic waterer for my flock. I have read that GSE is also very acidic, can it be used in a metal water container? Also can the two be used together? Thanks!