Hi I'm a frensh student,
For my university I have to make my own biosphere. By now I collected
some amphipodes and very tiny snails.
I would be very gladfull if somebody could tell me what I could add and
what to do to prevent my biosphere from death and make it more likely
to survive peacefully :)
I was also looking for some special algues and plants that I coudn't
find, perhaps because it's not the most apropriate season...
I know I have to add some shells/stones, and it would be good if I
manage to catch some water flees.
If somebody has some tips to give to me I would be very pleased!
Hopefully you have more experience with biosphere than I do!

Look forward hearing from you!