Made a terrarium for my Classroom — Here’s the Process

1 – aquire a 29 Gallon fish tank from a retiring teacher
2 – create drainage layer out of cut-to-fit filter foam. Also use this to create the hills and cave.
3 – spray great stuff pond and stone on the cliff face, sprinkling sphagnum moss and cocofiber on the surface to make it look more natural. Don't forget to smash some rocks in there too to add an extra layer of texture.
4 – after the foam sets, add a layer of charcoal on the bottom to help further filter and prevent smells. I have enough stink from the children, and I don't need additional smells from a terrarium setup 19.333 times the size I'm used to.
5 – add the substrate: 1 part fine orchid bark, 1 part lava rock, 1 part worm castings, 0.5 part coco coir, 0.5 part sphagnum moss, and 0.5 part crushed, dead leaves.
6 – add all the cool sticks and rocks you've been hoarding that your wife is not happy about you keeping them around the house, so really making this is doing her a favor.
7 – add plants like: baby tears, lemon button fern, satin pothos, manjula pothos, philodendron brasil, Bolivian jewel, oak leaf ficus. Also add some leaf litter and botanicals like acorn caps, bark, and tiny twigs for extra terrarium points.
8 – add isopods, millepdes, and springtails after a week or so. Also add a japanese painted fern, because it looked too perfect to leave out.
OPTIONAL
9. Accidentally introduce a woodlouse spider to terrorize and devour all the isopods you introduced.
10. Scr–masculinily exclaim when you find said spider lying in wait chilling by the lid before removing it.
11. Explain every step of the way to eager second graders that love seeing things in real time, so I can give them the same crippling terrarium addiction and I can lead them to populate reddit with their own terrarium content.