Biggest composting worms?
We started our worm bin for several reasons, the original being to meet a requirement for my son's gardening merit badge for boy scouts. The deal was he'd manage it for the required 90 days, and then it would become "my" bin for composting kitchen waste, producing castings for the plants and most importantly, a constant free food source for our box turtle. Things have been rolling along nicely - my son has met his requirement but is still interested enough to open the lid on the bin every few days and "help" any worms that have decided to try and make a break for it :). We have at best guess about 1000 worms at this point in the game, and are starting to see cocoons and babies. The thing is, my box turtle will eat on average 12-15 fat canadian nightcrawlers a week...and our wigglers are considerably smaller than that so he would really make a dent in the population of the bin. I was thinking about adding another type of worm in there and wonder which ones you guys think would be best? They'd have to get along with the wigglers, be prolific and fast growing, and as big as we can get 'em.
We actually do have some canadians in the turtle habitat who escaped becoming supper that seem to be reproducing, but we (including the turtle) only see them when we stir the substrate every other week. Depending on how many we find I tend to leave a few adults and all babies, and the extras go in the fridge...but it's not enough to sustain his diet and I'm still buying worms all the time. And now that winter has arrived, our supply of slugs, outside worms and pill bugs has dried up.
I'm leaning towards european nightcrawlers but wonder if there's another option that may suit our needs better?