I have a bunch of rock from my tank thats 2 months old.
i down sized from a 50 gal to a smaller tank.
Don’t know if they are mature enough for what you are looking for
It’s an almost two year old tank.
Looking to down size.
asking 850
Included:
reefmat 500 (1.5 months old)
return pump
skimmer
DIY mesh lid
Some cycled rock if needed.