The MARINA floating thermometer with suction cup is accurate and easy to read.

Can be attached anywhere in the aquarium. Provides both inside and outside aquarium readings.

For fresh and salt water. Accurate and easy to read. Safety zone indicator for most tropical fish. Protects fish from unsafe temperatures.

For thermometer. Practical accessory as a spare and for DIY enthusiasts.

For testing salt levels.

Thermometer by Hugo Kamishi. 13 cm.

minus 50 to plus 70 degrees C. Digital thermometer. 1.5v battery.

GLASS AQUARIUM THERMOMETER 0-50 DEGREES C 15 CM

GLASS AQUARIUM THERMOMETER 0-40 DEGREES C 11CM

With suction holder for attaching to the inside of the aquarium, the easy read thermometer from Interpet.

With the large, easy-to-read digital display of the JUWEL Digital Thermometer, you can easily keep an eye on the temperature in your aquarium.

This Marina LCD vertical mount liquid crystal thermometer provides accurate and easy to read temperatures readings in Fahrenheit and Centigrade.

Full-range digital thermometer. Pressure-sensitive backing. Green colour shows correct temperature.

Floating Thermometer by Penn Plax.

These are Penn Plax's basic internal thermometers for freshwater or marine aquarium use.

High Accuracy Seawater Refractometer Red Seas Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25 degrees C.