Hydro Tools 9245 Buoy Floating Pool Thermometer
This floating buoy style thermometer is simple and easy to use. It accurately tells you the temperature of your water in either Fahrenheit or Celsius. Its not digital, doesn't have any moving parts, and isn't fancy - This ensure years of productive use and no parts to worry about going bad. It tells you what you need to know to make sure that you can stay on top of your pool/spa maintenance all year long.