I visited "Ocean Design" store today - it is in Chicago,
at Irving Park Rd. I have seen $24 cleaner shrimps with
common black spot disease - all were infested with it!
The same symptoms mine shrimp died from a couple weeks ago.
Also, in the corals tank: thousands of quite big flatworms
crawling on glass, rocks, corals, sand - everywhere. Nasty
stuff. Be very careful buying anything live from this store!