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Amazon.com: SZELAM Aquarium Heaters 300W Submersible Fish Tank Heater 55 Gallon, Anti-Dry Burning and Anti-Overheating, Explosion-Proof Fast Heating Fish Heater for Freshwater and Saltwater Aquarium Tank Heater : Pet Supplies
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Corisrx Submersible Aquarium Heater Set - 55-100 Gallon Betta Fish Tank Temperature Controller, Turtle Tank Thermometer, Freshwater Saltwater Large Tank Thermostat (700W (for 124 to 140 Gallon)) - Walmart.com
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