How to make a self sustaining terrarium/vivarium out of soda bottles?
I need to make a completely self sustaining terrarium out of two liter bottles (2 of em, the bottoms of both taped together). And I need to know what plants and decomposers I should put in. It needs to be COMPLETELY self sustaining, once it is closed we are not allowed to do anything to it for 9 weeks. The ratio of producers (plants) to consumers (animals, aphids) /decomposers (worms) is 10:1
please help, I haven't been able to answer this question anywhere