Amazon.com: Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon : Pet Supplies
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Amazon.com: AQQA Aquarium Heater 100W Submersible Fish Tank Heater 10-30 Gallon Aquarium Betta Heater Small Aquarium with Suction Cups Thermostat Heater for Freshwater & Saltwater（100W） : Pet Supplies
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Amazon.com : Uniclife Aquarium Heater 25W/50W/100W/200W Adjustable Submersible Heating Rod with Electronic Thermostat LED Indicator Light and Thermometer Sticker for Freshwater Marine Fish Tanks : Pet Supplies
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Amazon.com: AQQA Aquarium Heater 100W Submersible Fish Tank Heater 10-30 Gallon Aquarium Betta Heater Small Aquarium with Suction Cups Thermostat Heater for Freshwater & Saltwater（100W） : Pet Supplies
50 Watt Submersible Small Fish Tank Heater - hygger
50 Watt Submersible Small Fish Tank Heater - hygger
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My Tetra 20-30 gallon submersible heater light keeps turning on and off. It's pre-set temperature is 79 degrees, and my tank is at 75. It is a new heater. I put it
