i HAD fish in the aquarium. had being the operative word. i got a very small long nosed butterfly from aquadome a while back and it apparently had ich, which was unnoticable at the time. it decimated all my fish except my tiny yellow clown goby (seen hiding amongst some palys in one pic). i had 3 ocellaris clowns, and a small foxface. may they rest in peace. now i have a healthy understanding of quarantine tanks!