Let's see. Tank, some sort of sand or crushed coral, in a 50? I'd do at least 1 piece of LR
and 30-50lbs base rock, power head, test kits for ph ammonia nitrite and nitrate, and some sort of light for viewing. Yup that would probably be enough for a FOWLR
. As for the stocking, lion fish and puffer are messy. You could probably do a dwarf lion, a smaller puffer species, a wrasse and a couple other smaller fish if you kept up on water changes. But the stocking I'd get another opinion cause I'm not to good with it.