The tank used to be 8000 L but I cut the top off, so its probably round 5000 ish now. hahaha, started off with 500 worms. but they populate as the bin fills up, then once ready the excess worms, tea and castings gets worked back into the gardens, orchards and net-houses.
this is a pic of the tank when I was starting it up.

beneficial entomology plays a crucial role in sustainable living.