Best Betta Heaters

byMazy Cave Lounge, Hideout Fish Tank Ornament with Suction Cup for Betta, Fish and Shrimp to Swim-Through, Hide, Rest - Aquarium Decoration with Plant Holder (Small, Clear White)

Interpet Deltatherm Aquarium Fish Tank Heater, adjustable, for Tropical and Marine, 200 W, for aquariums up to 180 litres, Black

HITOP HP-608 Submersible Aquarium Heater 25W 50W With Thermometer and Extra Sucker Cup (50W)

Aquarium Heater 200/300/500W with External Temperature Controller, Submersible Fish Tank Heater with Large LED Digital Dual Displays, Tank Heater Keep Stable Temp for Tropical Fish Betta Turtle, 200W

hygger Small Aquarium Heater, 15W Submersible Betta Fish Tank Heater with Digital Display External Controller, Turtle Tank Heater Suitable for Freshwater up to 10L Tanks

hygger Small Submersible Aquarium Heater,Mini Betta Turtle Tank Heater with Digital Display Controller,20W Fish Tank Heater Suitable for 3-19L Freshwater Tanks

HITOP Adjustable Aquarium Heater with Protective Cover, 30W 50W 120W Turtle and Fish Tank Heater for 5L to 120L Fresh Water and Seawater water Thermostat (50W)

ONLYSTAR Submersible Aquarium Heater ， Digital LED Display ，for Tropical Fish/Freshwater Fish/Betta Fish/Turtle，Shatterproof Heater， Fish Tank Thermostat- UK PLUG With Extra Sucker Cup (150W)

DoRight 50W Submersible Aquarium Heater 50L Digital Fish Tank Heater with Thermometer Intelligent LED Temperature Display, Over-Temperature Protection, External Temp Controller, Thermostat for Betta

GlowUp 50W Mini Fish Tank Heater, Submersible Aquarium Heater with Suction Cup and LED Digital Display Thermostat, Tropical Fish Turtle Tank Heater for Betta Fish, Saltwater and Freshwater up to 60L