Small tank setup for mandarin goby food

[Kes1221]

We bought some live pods last night but we want to be able to cut out that middle man and give them a place to live as well so we have more of a supply when we need it.

We haven't dug too deep into what we want as of yet but from what we can find on the internet we want to try and culture copepods. As that is what we are told they want to eat.

Our tank is 40 gallons, with a couple crushed rock piles in the corners. We know the mandarin will feed from there but we were told they would probably eat what we might have in the thank in a day or so.
Right now she is the only fish with a couple shrirmps, crabs, corals and snails.

We havent tried the frozen food approach yet (we did buy Mysis as well) as she has been shy and hiding behind and under some rock for the most part...