i would only get a dwarf type lionfish for that tank, a bigger lion wont even fit in that when it grows.
the dwarf would really be the only fish to have in the tank, since its a predator and makes a big bioload.
i would also get a hob skimmer like a octopus or remora pro for filtration.
and some live rock to bring in good bacteria and cycle the tank.
Correct, but I believe they stay smaller.
I'm currently researching them all, as thats what I want my next tank to be, but i really don't like fu manchus or fuzzy dwarfs, the zebras look to be ok. What I'm trying to get is the looks of the full size, yet smaller, and the antennatas seem to accomplish that the best, so I was just wondering where you got your info from saying they got bigger, because if so, I would need to rethink the tank.