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AQQA Small Aquarium Heater 15W/25W/50W/75W/100W Submersible Fish Tank Heater with Intelligent LED Temperature Display and External Temperature Controller for Betta Fish Tank and Turtle Tank 15W (for 1-5 gallon)
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Amazon.com: hygger 50W Mini Submersible Digital Display Aquarium Heater for Small Fish Tank, Compact and Fast Heating Thermostat, with External Controller and Built-in Thermometer, for Betta, Turtle : Pet Supplies
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Amazon.com: Aqueon Small Aquarium Fish Tank Submersible Mini Flat Heater Up to 3 Gallon Aquariums, 7.5 Watts : Pet Supplies
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Amazon.com: YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts) : Pet Supplies
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AQQA 500W/800W Submersible Aquarium Heater, Double Tubes Quartz Fish Tank Heater with External LCD Digital Temperature Controller Suitable for Marine Saltwater and Freshwater - AQQA-Make fish keeping easier!
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Amazon.com: DaToo 10 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 1 Gallon 1.5 Gallon : Pet Supplies
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15W USB Submersible Aquarium Heater Betta Fish Tank Heater with External Temperature Controller for Small Fish Aquarium Heater
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