The Horse Hydrator is a filter that rids water of unfamiliar tastes and smells & significantly reduces chlorine, soluble heavy metals, iron and hydrogen sulfides from your horse’s water. Even a minor decrease in the horse’s intake of water can cause major decreases in performance. At a loss of 2% of water intake there is 10-20% reduction in performance”. (http://equinechronicleonline.com/performance-horses-and-the-importance-of-hydration/). As horse competitors 10-20% of performance can make the difference between winning and losing. Easy to use. Filters more than 700 gallons of water, equivalent to 100 Buckets.