Thanks. He hasn't been eating either. There are 2 things that I did lately. 1. feed a little bit more live worms than usual and 2. gave them live brime-shrimp. I am thinking may be I dropped some egg shells in the tank.
Thank you.
I have a 500 litre aquarium with 12 Angel fish, some corydoras, a pair of bala sharks and a pair of bristle-nose catfish. All live in harmony with the exemption of some aggression between male Angels
Ph: 7.0
Ammonia: 0
Nitrites:0
Nitrates: 40ppm
I do 10 percent water change weekly but it's...