I think I will just enjoy it how it is for now.
A 20 tall with
Clown
6line
Royal gramma
Blood red shrimp
Yellow sea cucumber
Sea hare
5 or 6 astraea snails
2 nassarius snails
I took down my big tanks so my primary goal with this setup is to keep my existing livestock alive, get all the phosphates to leech out of the rocks, and be a corraline/ pod farm for when I setup another large tank.
I am building a refugium, hooking up a gfo reactor, and plan on 60% weekly water changes to try to help the phosphates out of the rock. It is over 13 years old so it probably has significant levels. I just didn't want to kill all the bristleworms/ peanut worms and life on them. I have done a vinegar bath and bleach bath on all the other rocks from the tank, and they are drying in the sun until my next build.
Would a brittle star have any issues with the 6line picking on it?