Pawfly Submersible Aquarium Heater 25 W Betta Fish Tank Heater Adjustable Electronic Heating Rod with Thermostat Overheating Protection and Protective Cover for Fish Tanks up to 10 Gallons

NICREW Aquarium Heater 100W, Temperature Adjustable Fish Tank Heater with Controller for 10-20 Gallon, Overheat Protection

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

hygger 50W Mini Submersible Digital Display Aquarium Heater for Small Fish Tank, Compact and Fast Heating Thermostat, with External Controller and Built-in Thermometer, for Betta, Turtle

KINGYEENUO 10W Submersible Aquarium Heater, for 1-2 Gallon Tank, Adjustable for Fish Turtle Tank, with Built-in Digital Display Thermometer, USB 5V 2A Powered Water Heater, Memory Function

Pawfly Aquarium Heater 200W Adjustable Submersible Heating Rod with Electronic Thermostat LED Indicator Light and Thermometer Sticker for Freshwater Marine Fish Tanks

Fonowx Small Aquarium Fish Tank Heater, 10W Temperature Controller, Intelligent Thermostat, Digital Display Used for 3L Water Tanks Fish Tank Heater

Adjustable Mini Aquarium Heater 0.5-40 Gallon Submersible Small Fish Tank Heater Digital Display Thermostat External Temperature Controller 10W/20W/30W/25W/50W/100W/200W

HITOP 50W Mini Adjustable Aquarium Heater: Digital Fish Tank Heater with Protective Cover and Controller for 5-15Gallon (50W(5-15Gallon))