10W Small Aquarium Betta Heater, Mini Fish Tank Heater for Preset Temperature 78℉, Submersible Fish Tank Heater, 5V/2A USB Powered Super Mini Aquarium Heater, for up to 1 Gallon Tanks

YARDHOBI 10W Small Aquarium Betta Heater, Mini Fish Tank Heater for Preset Temperature 78℉, Submersible Fish Tank Heater, 5V/2A USB Powered Super Mini Aquarium Heater, for up to 1 Gallon Tanks

NICREW Slim Aquarium Filter, Quiet Fish Tank HOB Filters for up to 5 Gallon Aquariums, Adjustable Flow, 42 GPH, 3W

API Freshwater Master Test Kit for Aquariums