I'm running 2 insulated 17 gallon totes they have 3/4 in blue foam board cut to fit they were old dwc totes lol but work great for keeping temp swings downnin the bins, I run closed bottom no leachate at all systems, I just control the moisture level via feed and bedding additions, mostly coco paper towels paper plates all the green kitchen scraps and all my rootballs and de foliation materials, and a handful or 2 of sprouted oats from some mycology fails I just top dress with handfuls of the stuff straight out of the bins, you get worms castings predatory mites and some tiny little centipede looking things, I've been told them and the mites are eating my worms but the populations are healthy so I'm not worried I'll also occasionally toss in some oyster shell powder, egg shells, kelp and alfalfa when I'm mixing soil just to keep the nutrients up in the castings not that they are lacking but I'm sure it doesn't hurt