I actually went ahead and did a full water change last night. Reason being: when I got home and looked at him & the water, the water had a bunch of stuff in it!! Looked like a bunch of fuzzy light brown colored lint, some in very small clumps (for lack of a better word), at the bottom of the tank. And the rest of the water had wispy bits of the stuff just floating around! I don't what know it was...if it was caused by the silver, or what. I just knew I couldn't have him swimming around in it. So I changed his water pronto. I didn't put in any more silver or bettafix. I'll wait and see what he looks like tonight when I get home from work. Last night he didn't look any worse.
Any ideas on what that stuff was floating in the water??