Save your aqua friends from the chilling temperature with a mini 50-watt Marina Submersible aquarium heater. Its compact size saves much space and provides reliable heating for fresh or saltwater aquariums up to 38 litres aquariums. The heater has an easy-to-access temperature set dial, an on/off pilot light indicator, and a bumper guard for fish safety. Made of high-impact glass, it is built to last under normal aquatic conditions and is durable. Elite Marina Submersible Pre-Set Mini Heater 50W