Aqueon Preset Aquarium Heater Black, 50 Watts, Up to 20 Gallons - Walmart.com
Aqueon Products - Aqueon Preset Heaters require no adjusting! The preset temperature has been calibrated to 78°, appropriate for most tropical fish. Get the scoop on this practical heater here https://hubs.ly/H0dS_Mp0
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Aqueon Preset Aquarium Heater Black, 50 Watts, Up to 20 Gallons - Walmart.com
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Aqueon Submersible Aquarium Heater, 50 Watts, Up to 20 Gallons - Walmart.com