Squirrelfish Pop Eye Bob: Sorry to bother you again, but this weekend our squirrelfish appears to have come down with what I think may be a case of pop eye. A clear bubble has appeared over only his right eye. He is eating fine, and otherwise looks normal.  The water is excellent, as I had it tested over the weekend, and just did a 10% change. The other fish all look great. I am purely speculating, but since we just started feeding krill to the puffer, and the squirrel eats a little, is it possible that this is a reaction to the krill? I read in your "bible" that sometime the best course of action is to do nothing, or perhaps treat with medicated food. I would appreciate your advice and course of treatment to take. Please be as specific as possible, Bob, as I am still new to the game and want to do the conscientious thing. Thanks, Mitch  >> Thank you for writing, and being an active part of this forum...  Well, this is exactly one of those cases of "keep water quality high, do nothing"... The Squirrel likely "bumped" the eye (if it only one-side), and will likely self-heal... Nah to the krill having an ill-effect, unless the fish got so excited in trying to get some, that it ran into something else! These sorts of "unilateral exophthalmia" sometimes take months to resolve... so, be patient.... And do try feeding the Squirrel near to lights off, or shortly thereafter... this is when they feed in the wild.