The Fluval T-Series range of aquarium heaters combine electronic accuracy, reliable monitoring, and multiple safety features to easily maintain the desired aquarium water temperature. The T-Series Heaters feature a 360° indicator light ring which displays the heat mode (illuminates RED when heating function is engaged and BLUE when desired temperature is achieved) clearly from any angle, while a convenient large grip dial allows users to adjust the water temperature with ease. In absence of water, the T-Heater range automatically cuts power to prevent overheating, whilst a heater guard provides additional peace-of-mind protection. Fluval T Series Heater Specifications: Fluval T50 Heater for aquariums up to 50L - [Heater Height 26.6cm] Fluval T100 Heater for aquariums up to 100L - [Heater Height 26.6cm] Fluval T150 Heater for aquariums up to 150L - [Heater Height - 31.8cm] Fluval T200 Heater for aquariums up to 200L - [Heater Height - 31.8cm] Fluval T300 Heater for aquariums up to 300L - [Heater Height - 35.7cm]