WaterWell™ Waterers are lower profile than others on the market to enable access for livestock of all sizes. The flotation balls act as a visual water level cue. If they can be seen from a distance, there is adequate water within. The balls also help to seal the Waterer in the summer to reduce evaporation and keep the unit dark. This virtually eliminates algae growth. Livestock quickly learn to push the balls down to access the fresh water beneath. The ball opening is purposely made larger to comfortably accommodate the muzzle of even the largest animals. The flotation balls also help with water temperature control. Select white balls for the summer months to reflect the heat, and black balls, which absorb sunlight, help to keep the water a little warmer in the winter. The black balls are also more visible in the snow. Inside, the float is square, which provides a greater flat surface area to encourage full water shut off once the desired water level is reached. The float arm allows you to easily adjust your water level. Keep the level high in the summer to meet increased livestock demand, then lower the level during winter, to prevent the flotation balls from freezing in the lid.