Undergravel filters do have their use in Rift Lake tanks, and in other application where plants will not be used. They are inexpensive, and provide a huge amount of biological filtration. If an undergravel filter is to be used, you will have to also purchase either powerheads or an air pump to power it. Check with your local pet store for appropriate sizes. CO 2 Generator See specific directions for making a yeast reactor.
Most classrooms are short on available electrical outlets.
Use a heavy duty power strip to provide power for your aquarium equipment. If you cannot locate the tank near an outlet, use a heavy duty extension cord. Filled, it will weigh close to 10 pounds per gallon. If you have a sturdy counter, that should be adequate. 10 gallon tanks can be placed on a sturdy table.