I wanted to use the current ADF tank as a QT without the frogs in it. Once I remove all the medication in the 6 gallon, I was thinking of moving them back since the ammonia is down to 0 now.

I don't want a mate (if you mean to make little fish babies). I just thought it might be nice to get Dopey some other tetras since they're schooling fish and he's all by himself in the 6 gallon.