![Tetra HT Submersible Heater 50 Watts, For Aquariums Up To 10 Gallons, UL Listed for Sale in San Antonio, TX - OfferUp Tetra HT Submersible Heater 50 Watts, For Aquariums Up To 10 Gallons, UL Listed for Sale in San Antonio, TX - OfferUp](https://images.offerup.com/xI0Z3c89-CrmgBebF5QVv0dFwVc=/1440x1920/8610/86104992721b4c739a966d930b854efc.jpg)
Tetra HT Submersible Heater 50 Watts, For Aquariums Up To 10 Gallons, UL Listed for Sale in San Antonio, TX - OfferUp
![Amazon.com: Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon : Pet Supplies Amazon.com: Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon : Pet Supplies](https://m.media-amazon.com/images/I/81TdZIzoTML._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon : Pet Supplies
![Amazon.com: Tetra 26446 HT Submersible Aquarium Heater With Electronic Thermostat, 100-Watt,Multicolor : Pet Supplies Amazon.com: Tetra 26446 HT Submersible Aquarium Heater With Electronic Thermostat, 100-Watt,Multicolor : Pet Supplies](https://m.media-amazon.com/images/I/81zJCOzmGOL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Tetra 26446 HT Submersible Aquarium Heater With Electronic Thermostat, 100-Watt,Multicolor : Pet Supplies
![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 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](https://external-preview.redd.it/7IaeTciIzU3qCPiPbY8J01WLmXR9ak7VXyKASN8fAXA.png?format=pjpg&auto=webp&s=28b397423ef5a9f85d425bbce20dd805321c7f49)
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
![Amazon.com: Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon : Pet Supplies Amazon.com: Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon : Pet Supplies](https://m.media-amazon.com/images/I/61fJ4zrsYaL._AC_UF1000,1000_QL80_.jpg)