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SunGrow Betta Heater, 10 Watts, Fully Submersible Aquarium Heater, Automatically Reaches Preset Temperature, Ideal for Small Tanks, Suction Cups Included for Quick Installation : Amazon.ca: Pet Supplies
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SunGrow Betta & Turtle Submersible Aquarium Heater with Thermostat, Electric Heat Controller for Tropical Fish Tank Water Temperature, 10-watt, up to 5-gal - Walmart.com
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