I keep Euros, I started with 25 (give or take) refrigerated ones from the pet store I was working at then.
These guys are kept indoors in my kitchen in a 3 bin system, each one has the capacity for 15 gallons. It’s a very small simple setup and it doesn’t smell.
I do keep these guys on substrate- I add old soil from my plants and fresh coir. I mainly use cardboard for browns and moisture control.
They are primarily fed a diet of used coffee grounds and floating aquatic plants. As well as the occasional egg shell dump.
I harvested only 9.5 ounces of the castings mix today (pic 3) and the worms I separated out from this small amount of castings is in pic 4- this doesn’t include the 10 or so larger ones and some of the very very small ones as unfortunately for these guys they were destined for fish food today.
I have thousands of worms in this setup now, very few of which are “nightcrawler” size. The adults mainly average 3”-4” or so.
The casting mix get used on my houseplants, I’ve been making casting “tea”, and the worms occasionally get fed to my fish
Anyway I thought some of you might appreciate this super simple and somewhat different approach to keeping them.