HELP...DISCUS IS IN TROUBLE!!!!

[fishgeek]

does the fish look kind of lop sided?
is the left gill cover moving more than the right?

i cant see the mucous you describe coming from the gill region, though gill irritation will cause mucous and fluke do look pale often

things that may affect one side more than other would be parasites and foreign bodies
are you happy handling and examining that gill

or maybe it is just my eye'e

andrew

[sammigold]

I think those parameters are excellent.
Well done andy on getting those nitrites down.

your nitrate reading is good.

I would suggest that you keep doing small 10%water changes everyday whilst you still have fry in there. Once they are gone you should be able to return to your normal routine.

cheers
sammi