I want to stock new tank with copepods, amphipods and mysid shrimps to provide food for fish that i will be introducing in a week or two, any reason not to or any advive would be appreciated
Sounds like a nice, basic macroalgae tank. Can be as big as you want, but will take a lot of red light to grow. A simple overflow into your display will do the trick.
If you size your fish right, you will never have to feed again.