If it was training for sincronised swimming I might have been happy, but this fish, after loosing its partner, has been in head standing position for a week!!! It will come and chase food to some extent; if chased it will swim relugarly. But the minute it stops, it goes head down. A course of triple-sulphur tablets and two "tubing" of panacur, have had no effect.
Water parameters are ok.
I might try metro next; but really I have no idea what I am fighting here. Any ideas??? PLEASE!