6oz of BB wont last very long if you mix it the way your supposed to in the instructions. I use 2 cups of water to 1/2 heaping cup of bb. I make it on the stovetop, not microwave. So 6oz would only make one batch.
You do need to be carefull how big a piece you give the cricks because they are so stupid, they actually drown or suffocate in it if its too large a piece.
I am always finding dead cricks under the bb and other wet fruits and veggies I put in there.