AquaMiracle Mini Aquarium Heater 5V/2A USB 10W Small Fish Tank Heater for Tan… on July 20, 2026 July 22, 2026 Manufacturer : AquaMiracle. Manufacturer: AquaMiracle. #34 in Aquarium Heaters. SUPER MINI SIZE This small aquarium heater is thumb size – only 1.97 (5cm) in length. Great for nano tanks / betta tanks.