Plan the perfect garden with our interactive tool →

How to Build an Enclosed Terrarium With a 10-Gallon Aquarium

...
Aquarium image by crossgolfing from Fotolia.com

A terrarium is a miniature environment in which plants live and grow. Closed terrariums have a cover that allows the container to become a biosphere where water is produced by the transpiration of the plants and does not usually need any additional watering. A 10 gallon fish tank or aquarium is perfect for this type of terrarium.

...
Morgan_dishes1_070307 image by TMorgan from Fotolia.com

Wash the aquarium out with dish soap and water. You should wash it even if it's new and certainly if it has housed fish before. Rinse thoroughly and leave no soap residue in the aquarium. Make sure it is dry before continuing.

  • A terrarium is a miniature environment in which plants live and grow.
  • Closed terrariums have a cover that allows the container to become a biosphere where water is produced by the transpiration of the plants and does not usually need any additional watering.
...
pebbles image by rrruss from Fotolia.com

Lay a thin layer, about ½ to 1 inch, of pebbles or non colored aquarium pebbles at the bottom of the aquarium. This will ensure good drainage around the roots of the plants so they will not get too much water. It also will help in deterring any mold.

Sprinkle a thin layer of crushed activated charcoal over the top of the pebbles. This will allow the water to remain clean as it eventually recycles in the environment. Open terrariums do not need this step because they are continually watered with new water.

...
ibis in cypress image by Stacey Lynn Payne from Fotolia.com

Place a layer of sphagnum or Spanish moss after the charcoal and before the soil. This separates the soil and does not allow it to sink down into the pebbles where it can become muddy. The roots of the plants will be able to penetrate and grow through the moss. This is an optional step but one well worth doing.

  • Lay a thin layer, about ½ to 1 inch, of pebbles or non colored aquarium pebbles at the bottom of the aquarium.
  • This separates the soil and does not allow it to sink down into the pebbles where it can become muddy.

Lay down a thick layer of sterile potting soil of about 4 to 6 inches. This layer can be thicker if you like to make contours of hills and valleys. Try to make it no more than 8 inches and no less than 3 inches.

...
green house image by Keith Pinto from Fotolia.com

Choose smaller houseplants to plant in the terrarium. Desirable plants do not grow large to begin with. Choose plants with the same water and sun requirements as it will be difficult to separate them. Never plant cacti with houseplants. Choose a variety with different shapes and colors. Some examples are palms, small pines, ivy, prayer plant, and crotons but there are many that can be used in a terrarium. Pick an odd number of seven or nine for a 10 gallon aquarium.

  • Lay down a thick layer of sterile potting soil of about 4 to 6 inches.
  • Pick an odd number of seven or nine for a 10 gallon aquarium.
...
spray bottle nozzle image by Kathy Burns from Fotolia.com

Plant the plants by digging a hole that will accommodate the root ball of each plant in the soil. Remove the plant from the pot and loosen the roots. If there are some long roots you can cut those with clippers or scissors so they are all uniform. Place the roots in the hole and cover up to the base of the plant with soil. Tamp down lightly so they are secure in the soil. Once all plants are in, spray with water in a spray bottle but do not saturate the soil.

Place a piece of glass or hard plastic over the top of the aquarium. You can have a piece cut to size at a glass store. You will have to remove it if the terrarium needs to be watered. Place the terrarium in a place with filtered sunlight.

  • Plant the plants by digging a hole that will accommodate the root ball of each plant in the soil.

Tip

Use stones, statues, and miniatures that will not mind getting a little wet in your terrarium to create a theme and some interest. Stepping stones, a pagoda, a few cranes or other birds make nice additions to a terrarium. Closed terrariums take a few weeks before the environment starts to develop. After about three or four weeks, it should established and you will start to see water droplets forming on the sides and the top. If this does not happen it may be that there is too much sun. Move it to a more shaded area. Pinch back plants if they start to grow to the top of the terrarium. If plants outgrow the terrarium, replace them with something smaller.

Warning

Use hard plastic for the top of the terrarium if there are small children in the household. This will not break if it is knocked off the top of the terrarium and the corners can be ground down so they do not have sharp edges. Do not put an aquarium terrarium in full sun. Always place it in filtered sun to partial shade. The glass heats up with the sun’s rays and dries out everything. Do not try planting cacti in a closed terrarium as they need a much drier environment.

Related Articles

How to Maintain Indoor Plants
How to Maintain Indoor Plants
How Do Plants Survive in a Terrarium?
How Do Plants Survive in a Terrarium?
How to Remove Tannin From a Pond
How to Remove Tannin From a Pond
How to Grow Orchids in a Terrarium
How to Grow Orchids in a Terrarium
How to Make a Forest Terrarium
How to Make a Forest Terrarium
Signs That a Bromeliad Is Thirsty
Signs That a Bromeliad Is Thirsty
How to Grow Herbs Inside Aquariums
How to Grow Herbs Inside Aquariums
How to Use Mosquito Dunks to Control Gnat Infestations in Houseplants
How to Use Mosquito Dunks to Control Gnat Infestations...
Houseplant Leaf Identification
Houseplant Leaf Identification
How to Take Care of a Chinese Bamboo Plant
How to Take Care of a Chinese Bamboo Plant
How to Treat Pond Plants With Potassium Permanganate
How to Treat Pond Plants With Potassium Permanganate
How to Grow Lily Pads in an Aquarium
How to Grow Lily Pads in an Aquarium
House Plants That Produce Oxygen
House Plants That Produce Oxygen
Garden Guides
×