Gamco Concentrated Non-Toxic Pool Anti Freeze is a great way to winterize your pool with just one bottle, giving you more bang for your buck. Its non-toxic formula ensures that it will not contaminant your pool water like traditional anti freeze, yet is still able to effectively prevent your plumbing from freezing down to minus 40 degrees F. Simply follow the handy chart printed on the bottle for proper dilution. Best of all, this product is completely safe for use with all types of pool plumbing, saving you from corrosion damage that lesser products can generate.