Yes, I did a water change yesterday and just this second did another 20% water change. He seemed to come alive a little more and was swimming up and down. Do you think the water temp is okay at 27.5C or is it a little high.... could this cause any of the problems Puff is having ???
Okay...good news again...since I did the water change he has eaten and is swimming around and is even fanning his tail out which I haven't seen him do yet!!!!

...so, I guess that means he is happy...for now at least.
So, do I carry on doing the water changes daily until the nitrite level is down to 0 on it's own without the water changes???