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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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Aquarium Heater with Digital Temp Controller Shatterproof Titanium Tube Submersible Fish Tank Heater for Saltwater Freshwater
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Amazon.com: HITOP Mini Submersible Aquarium Heater - 50W Digital Heater for Fish Tank Turtle Tank 5-15 Gallon, Saltwater and Fresh Water with Temperature Controller (50W) : Pet Supplies
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Amazon.com: HITOP Mini Submersible Aquarium Heater - 50W Digital Heater for Fish Tank Turtle Tank 5-15 Gallon, Saltwater and Fresh Water with Temperature Controller (50W) : Pet Supplies
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Amazon.com: FREESEA Aquarium Fish Tank Heater: 75 Watt Mini Submersible Water Heater with Digital Temperature Display - Adjustable External Controller for Betta | Turtle | Goldfish | 5-15 Gallon : Pet Supplies
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