I have a bio cube 29 with the following.
1 orange spotted goby
1 six line wrasse
1 harliquen shrimp
1 pistol shrimp
Assortment of CUC members and a brittle star fish (reef safe)
Over a year and a half, no issues.
"When creating an aqua scape, strive for the beauty of imperfection, as its art and there is no wrong or right, it's left open for interpretation" James Findley