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Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W : Amazon.ca: Pet Supplies
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Amazon.com: Aquarium Heater, 5W Fish Tank Heater Mini USB Submersible Heater Aquarium Heating Rod for 0.5-2L Fish Tank : Pet Supplies
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