The vinegar works good. A ole man told me one time that he use to line the bottom of his water buckets with copper tubing, coiling it from the out side all the way to the middle. He said that he never had to scrub his water buckets. I give fresh water every 2 days so I only have to scrub buckets every couple months, plus my bucket are cut in half to conserve on water and makes it easy on my pigmy hog dogs
