I have a group of 8 or so in a 33g long. no substrate, some wood a few random egg rocks and a cave on each end. They really don't pair and are more harem breeders, my boy in the pic is sitting on eggs every 2 weeks it seems. 2.5" SL is when mine started breeding. my dom male is roughly 3" SL and 6" TL. That pic is of him on the 5th batch of fry.
I feed NLS thera A, blood worms, zucchini and algae wafers.