Hanging thermometers give a temperature reading from several inches below the surface, instead of just at the surface, where the water is typically warmer.  Our floating thermometers can be fun and decorative, in the shape of a duck or many different shapes.  We can also do custom shapes as needed.  

Digital thermometer 

They work quickly, are very accurate and available as solar thermometers so they do not need batteries.  Wireless digital pool thermometers are also available,