Bert "dropped" his moldy spot sometime yesterday and looks fine today. He is eating, swimming, and acting his normal self!
And, on a brighter note for all those that helped with my daughter's betta's problem - he seems to be doing much better. He has been in his hospital tank for a couple of days now. No meds, just watching him. This morning he was actually swimming at the top of the tank, ate a good breakfast, and (get this) I even saw him blowing some bubbles at the top.....I promised him last night that if he pulled through he could have the new 5g tank all to himself. Obviously, he wants that tank!