Classic glass thermometers for use in freshwater and salt-water aquariums. Provide accurate measurement of the temperature in the tank. Thanks to their small diameter, compact size, and transparent colours they are inconspicuous and do not divert one's attention away from the aquarium interior. The thermometers are mounted on tank walls using their reversed J-shaped endings. Especially recommended for open aquariums (i.e. those without a lid). for 10mm Glass