American Thermal Liquid Crystal Aquarium Thermometer Vertical Small

Aqueon Mini Heater for Aquariums, 5W, Under 2.5 Gallon

NICREW Mini Preset Aquarium Heater, 15W Submersible Betta Fish Tank Heater with Electronic Thermostat

Marina Betta Submersible Heater for Aquarium

Marina C10 Compact Heater, 10-Watt

GOOBAT Mini Betta Heater for Aquariums, Submersible Heater for Betta Tanks Up to 5.5 Gallons, 15W

Tetra HT Submersible Aquarium Heater With Electronic Thermostat

Cobalt Aquatics 31020 5W Mini-Therm Heater

Penn Plax Aquarium Fish Net - Aqua Blue Quick Catch Mesh Wire Net Safe for All Fish - 4 Inches

Luffy Nano Betta Balls, 0.4-inches, Live Round-Shaped Marimo Plant, Toys for Betta Fish, Hiding, Rolling, Nibbling, Cleans Aquarium Water & Adds Aesthetic Value to Betta Bowls and Jars, 6-Pieces

Aqueon Flat Heater, 7.5W, up to 3 Gallon