Marina Submersible Pre-Set Aquarium Heater Mini 50W Filter_306 it also visibly reduces stress

it also visibly reduces stress in fish caused by transportation

An integrated shut-off feature automatically cuts power in the absence of water to prevent overheating

high performance Fluval 207 external filter

235 x 130 x 155mm

Marina Submersible Pre-Set Aquarium Heater Mini 50W Filter_306 it also visibly reduces stressSmall yet powerful, the mini 50 watt Marina Submersible Aquarium Heater provides reliable heating for fresh or saltwater aquariums up to 38 litres (8 US gal) aquariums. The heater includes many practical features for easy use, safety and convenience, including an easy to access temperature set dial, on off pilot light indicator, and a bumper guard for fish safety. Made of durable high impact glass, it's built to last under normal aquatic conditions.