50 W Fish Tank Heater Submersible Aquarium Heater Adjustable Electronic Heating Rod with Thermostat Overheating Protection and Protective Cover for 10-20 Gallon Fish Tanks

300W Submersible Aquarium Heater, Adjustable Fish Tank Heater with Digital Display External Controller, Overheat Protection and Free Thermometer for 40-60 Gallons Freshwater and Saltwater Tank

25W 50W 100W 200W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cup (50W)

2 Set Submersible Aquarium Heater, 100W/300W Adjustable Aquarium Fish Tank Heater with 4 Thermometers Stickers and Suckers, Adjustable Knob Thermostat for Marine Saltwater and Freshwater(300W)

1300W Titanium Fully Submersible Portable Electric Immersion Water Heater,Bucket Water Heater,Seawater Heater for Fish Tank,Seawater Aquaculture,100% Protection Against Seawater Salt Corrosion