Fluval P25 Submersible Aquarium Heater for Up to 6 Gallons, 25 Watts : Amazon.ca: Pet Supplies
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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) : Amazon.ca: Pet Supplies
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DaToo Aquarium Heater Fish Tank Heater Submersible 25 Watt, 1 Yr Warranty : Amazon.ca: Pet Supplies
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