Planted Tank Guru
Join Date: Jul 2010
Location: British Columbia, Canada
Yes, you're feeding your fish, but the Cories may not be getting enough to eat.
I often need to feed my Cories separately at the tank bottom with, e.g. algae thins or pellets, because the discus gobble everything up very quickly, and very little food ever reaches the bottom, even though I feed several times a day.
So my Cories sometimes get shorted.