another update, Blueberry is hanging in there and seems to be moving around much better in the tank. going to do a water change tomorrow morning (25-30%) and then if all stays like this for a while, I'll put him into our display tank and then clean the QT tank and possibly begin prep for converting it into a mini reef.
thanks for all the advice and opinions in this thread, I think it has gone a long way in helping us to get Blueberry back to normal.