Mini Aquarium Heater 15W Super Small Fish Tank Heater with Digital Display Th… on July 19, 2026 July 22, 2026 Mini Aquarium Heater 15W Super Small Fish Tank Heater with Digital Display Thermostat, Alumina Ceramic Betta Tank Heater Turtle Heater for 1-3 Gallon Tanks. #19 in Aquarium Heaters. Included Components: Mini aquarium heater, Suction cup.