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Aqueon Submersible Aquatic Flat Heater Mini Up to 2.5 Gallons, Black, 5 Watts - Walmart.com
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Stainless Steel Aquarium Heater for Fish Tank 50-300W | Lucky Monet – BECHAEO
hygger Fish Tank Water Heater - hygger
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5 Gallon Mini Inline Fish Tank Heater - Hygger
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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Amazon.com: PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) : Pet Supplies
Aqueon Pro 50 Submersible Aquarium Heater | Petco
NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, UL Listed 50-watt
FISH BREATH Aquarium Heater 50/100/200/300/500Watt for 5-90 Gallons, Submersible | eBay