Fish Tank Terrarium Ideas

Here are some ideas for converting a fish tank into an aquarium:

Bog terrarium with carnivorous plantsDesert terrarium with cacti and succulentsRainforest terrarium with plants such as moss and fernsHerb garden terrarium, leave the top open and snip as often as you likeWoodland terrarium with moss, ferns, and plants such as ginger or violets

Creating Aquarium Terrariums

Here are simple steps for making a miniature, self-contained ecosystem. The finished product is beautiful, and once established, caring for a DIY fish tank terrarium requires very little effort. 

Closed aquarium terrariums are easiest and are well-suited for plants that like humidity. Terrariums with open tops dry out quickly and are best for cacti or succulents.  

Scrub your aquarium with soapy water and rinse well to remove all soap residue.

Start by putting one to two inches (2.5-5 cm.) of gravel or pebbles in the bottom of the tank. This will allow for healthy drainage so the roots don’t rot.

Add a thin layer of activated charcoal. Although charcoal isn’t absolutely necessary, it’s more important with an enclosed terrarium because it will help keep the air in the aquarium clean and fresh. You can also mix the charcoal with the gravel.

Next, cover the gravel and charcoal with one to two inches (2.5-5 cm.) of sphagnum moss. This layer isn’t a must, but it will prevent potting soil from sinking into the pebbles and charcoal.

Add a layer of potting soil. The layer should be at least four inches (10 cm.), depending on the size of the tank and your fish tank terrarium design. The terrain in your tank needn’t be flat, so feel free to create hills and valleys – much like you’d see in nature.

You’re ready to add small plants such as miniature African violets, baby tears, ivy, pothos, or creeping fig (never mix cacti or succulents with houseplants in your DIY fish tank aquarium). Moisten the potting soil lightly before planting, then mist after planting to settle the soil.

Depending on your fish tank aquarium design, you can embellish the tank with twigs, rocks, shells, figurines, driftwood, or other decorative objects.

Caring for Your Aquarium Terrarium

Don’t put the aquarium terrarium in direct sunlight. The glass will magnify the light and bake your plants. Water only if the soil is almost completely dry. If your aquarium terrarium is closed, it’s essential to vent the tank occasionally. If you see humidity on the inside of the tank, take the lid off. Remove dead or yellowing leaves. Prune plants as needed to keep them small. Don’t worry about fertilizer; you want to maintain fairly slow growth. If you think the plants need to be fed, use a very weak solution of water-soluble fertilizer occasionally during spring and summer.

Fish Tank Terrarium   Converting A Fish Tank Into A Terrarium Garden - 37