Concerned about my Plec

Jul 11, 2011
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I've got a plec, had him in the same tank for about three years. He is about 22cm long and has suddenly become very active during the day. He has habitually always kept himself hidden under some plants by day and then been very active by night.

A couple of days ago, I noticed that both his eyes had turned white, and then today I saw that the scales over his nose have completely disappeared.

RECENT Changes to the tank - A week ago, I added 10 zebra darnia's and 8 mollies. I noticed that one of the mollies had white spot, so I treated the tank for it. Yesterday (about 5 days after treating for white spot) I did a 30% water change.

What can I do to help my plec? I am feeding him the regular plec tablets. But, I have not seen if he eats at all. The dumb mollies seem to eat everything. Any help / advice will be appreciated.