rapidly swimming circles, rubbing head along glass?? what to do?
You need to move the fish into a separate tank, sorry to say but most likely it is not going to survive. You need to fill the Questionnaire in the emergency room and may be the mods will move this thread to the emergency room
Quote from Colin Powell
"There are no secrets to success; don’t waste time looking for them. Success is the result of perfection, hard work, learning from failure, loyalty to those for whom you work, and persistence. You must be ready for opportunity when it comes"