Hygger Titanium Heater with Digital LED Controller and Temperature Probe is an extremely efficient, ultra-modern electronic thermal device for heating your aquarium. Fully controllable, easy to use, and accurate it comes supplied with an external controller, and an unobtrusive temperature sensor. Super strong, these titanium heaters are explosion, corrosion, ozone, and drop-proof. This 500W model is suitable for freshwater, marine and turtle aquariums from 265-302 litres.