Large Sump. What to put in it?

[SeaHorse_Fanatic]

I've had my fuge area set up as a temporary frag system before. Similarly used it to keep mandarin goby and now some rescued baby cuttlefish that hatched at LFS and would have died in the store without any live food. Hopefully at least one of the three still survives hunting down my live pods and mysid shrimp in the fuge.