well in the beginning i thought it was ich because my regal tang when i first got him had a outbreak of ich and with in a few weeks he cleared up and had a few moments where it seemed to come and go but nothing that lasted anymore than a day ... anyway i got two yellow tangs and things still ok and then i know i shouldnt of but introduced a powder blue that is probably small to medium size and i know with tangs they are prone to ich .... anyway within a week of everything settling down my sailfin and regal and powderblue all had what as i describe as a dusting of spots .... then it just seemed to get worse and worse my small dotty back has slight signs of it 2 and my clown goby didnt get spots but looked like a fungus but sorry to say he died this morning ... but all fish seem to be clearing up and are all feeding very well i am just feeding them loads of green and purple algae also algae flakes, frozen brine, mysis, krill and they are all nice and fat everything else in tanks seems ok all my inverts are good and other fish are good corals all good to... with the spots on the fish i asked the lfs owner to come take a look and he said it wasnt ich it looked like odinium/velvet so as a second opinion i thought i would ask u guys when i get a moment i will try and get a picture