One of my Blue Diamond Discus has turned dark blue and is malnourished. I treated him with Prazi Pro doses (two in two weeks). While he has been eating a little better, he still looks the same. Vienna aquarium said to try a third treatment. A FB Group I’m in said to treat with Metronidazole (I have no idea where to get that from). Any thoughts/suggestions?
Also, I’ve been treated my water with Seachem Safe for water changes... but I have never been putting a Stress Coat into the tank. Should I use a Stress coat as well?