Best Tetra Heater

Fluval T100 Fully Electronic Heater for Freshwater Aquariums up to 30 Gal.

HITOP HP-608 Submersible Aquarium Heater 25W 50W With Thermometer and Extra Sucker Cup (25W)

Interpet Deltatherm Aquarium Fish Tank Heater, adjustable, for Tropical and Marine, 100 W, for aquariums up to 90 litres,Black

NICREW Fish Tank Heater, Submersible Aquarium Heater with External Temperature Controller, for Fish Tanks up to 250 Liters, 300W

HiTauing Aquarium Heater, 50W/100W/300W/500W Submersible Fish Tank Heater with Over-Temperature Protection and Automatic Power-Off When Leaving Water for Saltwater and Freshwater

PYPABL 25W 50W 100W 300W Aquarium Heater, Submersible Glass Heater for 5L-300Litres Fish and Turtle Tank (50W for 15-55L)

HITOP HP-608 Submersible Aquarium Heater 100W 200W 300W With Thermometer and Extra Sucker Cup (100W)

hygger Submersible Aquarium Heater, Fish Tank Heater with Digital LED Controller & Intelligent Water Outflow Overheating Protection System, Suitable for Saltwater & Freshwater (800W for 300-800L Tank)

Interpet Aquatherm Tropical Aquarium Fish Tank Heater, Adjustable Temperature Control, 100w,Black/clear

JBA Submersible Aquarium Heater 25W/50W/100W/200W/300W Fish Tank Thermostat- UK PLUG (25W)