My question is similar to the previous post but my oranda has the opposite symptom ... he/she floats.

The tank was established in Nov last year, two orandas were introduced at the end of Dec. They are different sizes; the larger of the two has had no problems at all; the smaller seems to have had a couple of problems.

Initially it had white stuff oozing out of the top of it's head. I was told this could be due to head growth or bullying from the other one. I isolated the smaller on allowing it time to recover. Once the symptoms disappeared I reintroduced the larger one back into the main tank.

All seemed to be well until early last week when the smaller one became listless. I introduced a further 6 fish into the tank this evening and I noticed the smaller of the original 2 orandas floating on the surface.

I was about to fish it out and it swam off, setlled into a peaceful location in the tank and once again stayed still (faking death). It seems to struggle to swim down into the tank - if it stops swimming it seems to steadily drift to the surface.

What do you reckon?

I will do a water change again this evening (following your suggestion to the previous poster), whilst I eagerly await your reply.

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