I already breeding dwarf cray , like CPO, C. puer , C. montezume, C. shufeltdtii etc...
i want to move forward a bit and go in medium size cray.
what is the recommendation in term of facility to maintain , facility to breed , and of course facility to find.
and on top of that i would like (if it can be an option) something not too much agressive.
i know some of have great experience in this category.
so talk

PS: i am breeding/maintain many shrimps and dwarf cray so i am not new in invert

thanks in advance