Generally I am on the Physics Forum, but I got my hands on a good microscope a while back and decided to grow some little dudes to look at. My third incubation batch consisted of filtered drinking water and a bit of stuff from my mulch pile. Grew a few interesting little guys and looked them up online. Fourth batch I put in some grass with roots from my front yard. After about 3 days, WOW. I missed them at first because they were very small compared to what I had been seeing, even on 400X magnification. Much smaller than anything I had seen before and VERY active. They were concentrated on what looked like small pieces of "skin" cells from the grass shoots. Not sure about that. First time I saw them they just looked like tiny dots but took on a more or less oval shape when they moved away from their "perch." This was in a drop of water on a glass slide. There must have been thousands of them, but very tiny and moving very fast. Next day I could not see them any longer, but I think the debris I saw was dead ones. At first I thought the water might have had something in it that killed them as I know they add minerals for taste, but I think it was actually that they were not meant to live in water (thus the clumping on the pieces of grass "skin." Are these just smaller versions of what I normally find, or something else. I am going to do the experiment again in a slightly modified way. All suggestions/info appreciated.