Ph from 8.2 to 7.0????

#22
Just do a couple of water changes over the next few days. It's not hurting anything - whereas a total w/c might stress the fish out.
It isn't anything permanent and will go away with water changes. Also, if you dump all the water...and that tank water was buffered to 7.0...and you put 100% tap water back in, wouldn't that make the new pH in the tank 8.2 all of the sudden? You don't want that. Gradual water changes are the way to go.