So, since I joined this forum I see a lot of posts talking about spring tails. So I have a few questions. First what exactly are springtails? What are the benefits to adding them to my terrarium? And what do they do exactly? I think I have read that they help with the break down of the things and process them for the plants to utilize!? And that they eat mold!? If that is right where do I find some and how many do I need? Thanks!!