Ultra Sensitive Adjustable Aquarium Heater for Turtle Tank 50 Gallon 300W Black | eBay
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Amazon.com: HITOP Mini Submersible Aquarium Heater - 300W Digital Heater for Fish Tank Turtle Tank 45-70 Gallon, Saltwater and Fresh Water with Temperature Controller (300W) : Pet Supplies
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HITOP Adjustable Aquarium Heater with Protective Cover, 50W 100W 120W Fish Tank Heater for 10/20/30 Gallon Fish Tank or Turtle Tank : Amazon.ca: Pet Supplies
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MantaMaze 500W/800W/1000W Titanium Aquarium Heater - Submersible Fish Tank Heater for 50-300 Gallon with Over Heating Protection and Anti-Dry Burning - Suitable Freshwater and Saltwater : Amazon.ca: Pet Supplies
Corisrx Submersible Aquarium Heater Set - 55-100 Gallon Betta Fish Tank Temperature Controller, Turtle Tank Thermometer, Freshwater Saltwater Large Tank Thermostat (450W (for 50 to 80 Gallon)) - Walmart.com