Magnificant Firefish

[MMAX]

Magnus the Mag. Firefish passed away suddenly yesterday. I recently moved my tank to make space for my new one, emptied about 2/3 of the water and a few pieces of rock and slid it to it's new location about 10 feet away. I couldn't catch him since he had a cave dug under one of the rocks so I left him there while I moved the tank. That's the last time I saw him out. I'm thinking maybe the move/water change stressed him out too much. Also 2 days after, the power went out for about 5 hours possibly stressing him even more. Anyway my wife found him floating belly up yesterday afternoon. After I removed him I also noticed a small white speck on the side of my clown. Hoping it isn't what I think it is........