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Amazon.com: FREESEA Aquarium Fish Tank Heater: 50 Watt Submersible Betta Heater - Adjustable Thermostat with Thermometer for 5-15 Gallon Marine | Saltwater | Freshwater : Pet Supplies
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50 Watt Adjustable Temperature Submersible Water Heater - The Tye-Dyed Iguana - Reptiles and Reptile Supplies in St. Louis.
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Amazon.com: hygger 50W Mini Inline Quartz Glass Aquarium Heater with External Controller, Adjustable Submersible Betta Fish Tank Thermostat for 5-15 Gallon : Pet Supplies
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