NICREW
NICREW Aquarium Heater 50W, Temperature Adjustable Fish Tank Heater with Controller for 5-10 Gallon, Overheat Protection
Tetra
Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt
Abhirsh & Design
Abhirsh Aquarium Heater 50 Watt - Reliable Fish Tank and Immersion Water Heater, Adjustable Temperature Submersible Thermostat Heater for 5-10 Gallon
Fluval
16%OFF
Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781
YukiHalu
YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts)
hygger
hygger Small Submersible Aquarium Heater 50W Mini Betta Fish Tank Heater with Thermostat for 5-10 Gallon Saltwater Freshwater
Eheim
Eheim Jager TruTemp Submersible Heater - 50 W
hygger
hygger Marine 50W Titanium Aquarium Heater for Salt Water and Fresh Water, Digital Submersible Heater with External IC Thermostat Controller and Thermometer, Fish Tank Heater for Fish Tank 5-10 Gallon
AquaMiracle
AquaMiracle Adjustable 50W Aquarium Heater Submersible Fish Tank Heater Super Short Aquarium Heater with LED Digital Display Thermostat, for Tanks 5-10 Gallons