(please note that I don't get into the science part of aquariums. I use basic little test strips, if I think something is wrong, but otherwise, everything naturally keeps itself in order.) I have hard water, a neautral PH, and low alkalinity. I do a regular water change, once a week and have a large variety of plants in all of my tanks.
As Krap said, they are dwarf shrimp and don't get bigger than 2 inches.
Feel free to PM me.