I got my self some freshwater Hydras. Very exciting and interesting to watch feed. It explains where my ghost shrimp went. I only had two gravid females, and a male, all eaten up. It all happened when I went on vacation and in my 20 gallon, when I came home the tank was covered in these cool creatures. I had to go out and find some mosquito larva, to tide them over until tomorrow, going to get more ghost shrimp.
If when ever I change my mind on them all I have to do is put in my Blue Gourami and she will devour them. I'll watch them closely and make sure my copepods, and amphipods stay at a reasonable level.