Best 5 Watt Aquarium Heaters

HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature Protection and Automatic Power-Off When Leaving Water for Saltwater and Freshwater

Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt

HiTauing Aquarium Heater, 500W Fish Tank Heater with LED Digital Display & 5 Safety Protection, Submersible Aquarium Heater with 2 Suction Cup and 8.2Ft Cord for 75-120 Gallon Fish Tank.

NICREW Aquarium Heater 200W, Temperature Adjustable Fish Tank Heater with Controller for 30-50 Gallon, Overheat Protection

Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W

NICREW Aquarium Internal Filter, Submersible Power Filter with Multiple Function, Aeration System with Sponge Filter for Fish Tanks 5-10 Gallon, 53 GPH, 5W

Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781

NICREW Submersible Aquarium Mini Heater, Small Betta Fish Tank Heater with Electronic Thermostat, 15W

DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker, 1 Yr Warranty

Abhirsh Aquarium Heater 100 Watt - Reliable Fish Tank and Immersion Water Heater, Adjustable Temperature Submersible Thermostat Heater for 10-25 Gallon (100W)