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Amazon.com: FREESEA Aquarium Fish Tank Heater: 100 Watt Submersible Betta Heater - Adjustable Thermostat with Thermometer for 15-25 Gallon Marine | Saltwater | Freshwater : Pet Supplies
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Aquarium Heater 100W Submersible Fish Tank Heater, 5-100 Gallon Fish Heater for Fresh-Water and Salt-Water, 2Pcs - Walmart.com
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Amazon.com: hygger 300W Submersible Aquarium Heater with Digital Controller, Auto Shut Off Fish Tank Heater for 40-65 Gallon Freshwater/Saltwater Reef Tank : Pet Supplies
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