The classic way repurposing a fishbowl or aquarium is turning the container into a terrarium. Aquariums typically have removable lids, making it easier to assemble the miniature ecosystem. Spraying the glass bowl’s inside walls with water removes soil residue from the glass wall, while adding water to the soil for future irrigation. Do not to overwater, as soggy soil gets moldy.
When you have broken all the glasses in a set but one, there is no reason to toss the remaining glass. Depending on its shape and size, it might make an interesting terrarium bowl. Brandy snifters make ideal miniature terrarium bowls. Turn a glass flower vase into a terrarium.
Instead of using a glass container you have around the house, purchase a glass container designed specifically for terrariums. They come in a wide array of shapes and sizes. Find them in the garden section or at craft stores. Another option is purchasing a glass container with a lid, such as a glass cookie jar.
Recycle glass jars by turning them into containers for terrariums. This is especially useful if you are planning a terrarium project with a group of schoolchildren or scout troop. Having each child use a glass jar is more affordable than purchasing bowls. Wash the jars thoroughly and soak off the labels before proceeding with the project. You may, or may not opt to put the jars’ lids back on, after assembling the terrariums, to keep the moisture inside the containers. If you want a little air to get into the container, punch a few holes in the lid.