Get a fish tank and make sure that it's properly cleaned and ready to go.
Fill the fish tank approximately one third of the way with room temperature water.
Connect the airline tubing from the air pump to any air outlets inside your tank, such as air stones or decorations. After you finish, Add the rest of the water.
Set up your filter and “cycle” your new tank. Cycling your tank means growing the correct, healthy bacteria on a new filtration system to remove dangerous toxins.
Secure the submersible heater near your water flow and place the thermometer as far away from the heater as possible.
Plug in your air pump, power filter, and heater and start them up. Check the conditions and temperature after a few hours.
Congratulations! Your new aquarium is fish-safe, fish-ready, and fully equipped