I'm experimenting with the food chain, from the bottom up. Not that I really think I can do much about it in my pond, but it's something to do. I've ordered enough of 6 different organisms for 30 students each, whatever that means. Maybe 30 microscopic critters. The top of this chain is Moina, barely large enough to see without a microscope (I think). Another small order shipped today, 2 kinds of Daphnia and the scud, H. azteca. I received an order of another kind of scud today, lots and lots of scud in this order, many more than I had expected in what was described as a cup of scud. The key thing that's missing is the grass shrimp, P. kadiakensis.
