As far as "clean" corals go from WWC, in my opinion there is a huge difference between a few pieces of bubble algae or the random aiptasia, and things like nudi's, flatworms, red bugs, spiders etc. Although it's nice if they are, I don't expect that the corals I purchase from them are completely 100% algae or aiptasia free. I do, however, expect they won't have coral pests like nudi's, flatworms, red bugs, spiders etc, and that's why I trust my purchases from them. I'm not overly concerned with things like bubble algae or aiptasia, as I consider both easy to deal with both before putting the corals into the tank, and if they made it into the tank. I've personally never noticed bubble algae or aiptasia on the things I've purchased from them, and I don't see that stuff in the coral tanks at the store, nor did I see it in the farm when that was open during the grand opening of the new store. That's just my opinion on what I'm looking for when I purchase from them. I do think the new farm is better equipped than the old one for dealing with pests like bubble algae and Aiptasia, so hopefully even that stuff will not be something to worry about either going forward.