Just some thoughts. I did it for a while. There was a university paper PDF I had that was excellent, I can't find it now though. I think it may have been from Iowa. I don't recommend a Tupperware bowl - I think it is too small for any amount.
I kept them in a 3/4 full 10 gallon. Layers and layers of brown roll paper towel on the bottom - 1/2" or so. I used air stones and it worked well. I fed them cheap fish food occasionally, they will eat literally anything. You HAVE to keep them cool though. I found they didn't reproduce fast enough for my taste though. You have to do frequent water changes! Daily? Also, chlorine is particularly harsh on them - your water should be de-chlorinated before being added. I used old fish water a lot of the time.
1.5" of water seems to not nearly be enough to me. They produce too much waste.
If anyone's interested I can give a little history on their use in the hobby...
