Best 300 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

NICREW Aquarium Heater 300W, Temperature Adjustable Fish Tank Heater with Controller for 50-80 Gallon, Overheat Protection

HiTauing Aquarium Heater, 300W Fish Tank Heater with LED Digital Display & 5 Safety Protection, Submersible Aquarium Heater with 2 Suction Cup and 8.2Ft Cord for 40-75 Gallon Fish Tank.

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

Fluval M200 Submersible Heater, 200-Watt Heater for Aquariums up to 65 Gal., A784

HiTauing Aquarium Heater, Upgraded 300W/500W Fish Tank Heater with Intelligent Leaving Water Automatically Stop Heating and Advanced Temperature Control System, Suitable for Saltwater and Freshwater

Fluval T300 Fully Electronic Aquarium Heater, 300W, up to 80 US Gal / 300 L

YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts)

Fluval A774 E 300-Watt Electronic Heater Black

hygger Newly Quartz Fully Submersible Aquarium Heater, 300W Fish Tank Heater with LED Display Controller for 40-75 Gallons Marine and Freshwater Tank Heater