I know strange topic but this fish IS strange. I love this fish, it is a beautiful HUGE bllack Angelfish. This fish has been acting strange for months. I have a bit of a bully in the tank. It only picks on this fish, but not to the point of hurting it, at least not from what I have seen. This fish will on occasion go back at the bully and the bully flees the scene in a panic. The Black Angel fish is peaceful other then defending itself from Bully fish.
What has been strange is as of the last week this fish will be almost laying on the bottom of the tank with it's face down and tail up. I went to scoop it 3 times thinking he passed away but then he starts swimming around normally.
Now, I think he is sick of me trying to scoop so he swims a little inbetween and hangs out near the top. He isn't gasping for air, he isn't laying on it's side he just isn't normal.
The water parameters are good, all other fish are normal, I test my water with an API freshwater test kit. Always have used that kind. Water changes are large and frequent. Average is 65% every 4-5 days. I just don't get it. Up until yesterday, the fish has been eating normally too. I don't think he ate anything yesterday. I shut the lights off to reduce stress just in case but I do have floating Pennywort in there to darken it a bit for them anyway and many other live plants. Any thoughts?