My pajama cardinals never sleep, nor do the clownfish.
My Parrotfish sleeps in a mucous cocoon, in the same spot, behind the rocks. Not sure where the tang sleeps, he's skinny enough to fit about anywhere behind the rocks.
My gramma basslet sleeps on a rock in one corner, but the other fish just end up where they end up I guess.
180G build thread
180G All-glass with dual megaflows in a custom stand
AquaC EV-180 skimmer
250 pounds LR
160 pounds aragonite
Custom acrylic sump from GlassCages.com
2xPCX-40 return pumps
2x250MH 14K, 2x175MH 14K - PFO lighting, 2x65W PC
No-name 36W UV
Water General 125GPH RO/DI