Wonderfactory 75W Fish Tank Heater, Betta Fish Tank Heater, Mini Submersible Aquarium Heater with Digital Display & Five-Key External Controller for 1-5 Gallons Freshwater & Saltwater Tanks

Wonderfactory 75W Aquarium Heater, 5 Temperature Modes for 5-15 Gallon Betta Fish Tank Heater, 78°F Mini Submersible 5 Buttons Temperature Constant Easily Setting, Freshwater & Saltwater Tanks

Smart Aquarium Fish Tank 5 Gallon Starter kit, Self Cleaning System Efficiency Filter 7 Color LED Lights Automatic Feeder Temperature Display Monitor HD UHA Glass Leak-Proof, Smart Control with Apps

Aqua Natural Diamond Black 10lb, Premium Gravel and Substrate for Aquariums, Fish Tanks and terrariums, 1-2mm