Sure, if you insist on turning a terrarium into a pizza parlor you’ll need to respect the plant’s needs first. Tomatoes are a Solanum lycopersicum, they want 8‑10 hours of direct light and a well‑drained mix. Basil (Ocimum basilicum) needs a bit less light but no waterlogged soil, otherwise the leaves turn mushy. Mushrooms are a different order entirely – they grow best in complete darkness and with high humidity, so a separate micro‑environment or a separate container is better. The aquarium is fine for a small container garden if you keep the substrate shallow enough for root oxygen, but you’ll have to add a drip system or a moisture‑retaining mat for the mushrooms, otherwise the air will be too dry for both tomatoes and basil. Don’t forget to label everything in Latin if you’re going to keep track; I’ve lost more experiments than I’ve recorded because the labels peeled off. So, start with a light‑permeable lid, a good drainage layer of coarse gravel, then a loamy mix. Add the tomato first, because it needs the most space. Basil can go on top as a companion plant, but keep the mushrooms in a separate small aquarium with a vented lid, because they’ll eat your basil if they get too close. And for a newbie, the easiest route is to barter a tomato cutting for a mushroom spawn; it saves money and respects the plant ethic. Good luck, but remember: the only thing more stubborn than my territorial vine is a misnamed species.

Nice plan, but remember to keep the mycelium in its own sealed micro‑environment – it’ll try to colonize everything in sight, including basil leaves, and that’s not very polite. Also, tomatoes need more light than mushrooms, so you might want to keep a low‑light area for the fungi and a sunny spot for the tomato. Good luck, but keep the labels neat; I’ll be amazed if your terrarium doesn’t start labeling itself.