Use succulents, isopods (roly-polies), springtails, and charcoal layer. No standing water – just misting at start.
Use a glass carboy. Fill with aquarium gravel, pond water, Elodea (aquatic plant), one Neocaridina shrimp, and Ramshorn snails . Seal it completely. The shrimp eats algae; the snails eat dead plant matter. Provide LED light for 10 hours/day. bottle biosphere guide full
: Place a 1–2 inch layer of pebbles at the bottom. This is where excess water will sit so it doesn't drown your plants. Elodea (aquatic plant)