8) Euros prefer deep systems with higher moisture content – I am NOT going to claim here that these worms don’t thrive in deep, moist systems. What I WILL say, though, is that they clearly seem to do just fine in shallower – even open – systems. As I’ve mentioned, plenty of them have come out the bottom of my VB48 – but it’s important to note that there are still LOADS of them hanging out near the surface still.
What they really seem to like is sitting directly below sheets of newsprint or something similar. Most of my current Euro systems (VB48 included) are simply open bins with flyers, paper bags etc acting as a cover. The worms seem to be thriving!
Even shallow concrete mixing trays with NO cover whatsoever seem to work great!