Just letting everyone know how I set them up. they are in individual rubber-maide containers ... the kinda cloudy ones that are not quite clear but perhaps are trying to be. the lids lock down with dark gray flip-tabs. I drilled a few 1/2" holes in the lid for ventilation.
I am using spring water and running little power filters in each enclosure (ovations?... they were on sale... whatever they are).
the beasts are eating crayfish, cooked shrimp, pellet food, goldfish, and attempting to eat aquarium siphons, fingers, and forceps (cooked shrimp are handed to them). they do not seem to mind the filters though.
Water changes are probably averaging every 2-3 weeks now that I added the filters. It was weekly prior to that.
they are in my basement on the floor without heater and doing fine.
It's a boring set-up, but seems to be working.
greg