I have a 12 Gallon with 1 Red Honey gourami, 10 neons and 5 amano shrimps.
From 1 week now, the Honey Gourami started to blackened (fins darkening, belly etc..)
I know this is usually typical from male gouramis entering their maturity. However, for 3 days now, he is staying on top of the aquarium, not really moving, and sometimes on his side.
He does not seem to have any visible problems (ick, fin rot etc...)
Should I be concerned of his health?
Neons does not seem to bother him at all.
PH = 7.4
Ammonia = 0
Nitrite = 0
Nitrates between 0 and 5
Do a weekly 20% water change
Thanks for your comments.