For people who don't know a terrarium is like a aquarium but for bugs. We know that because terra means earth. A terrarium is a field or any place where bugs can live or grass can grow
Photo by Garden Atlanta
The bottom is a aquarium where we keep our snails and plants. The reason you need the plants is because the plants will give out O2 (oxygen). The snails will take the oxygen and give out CO2 (Carbon dioxide)which is what the plants need. You also might also want to put algae for the snails to eat or they might eat the plants, my snails ate some of our plants off.
Photo by Dabney B.

