Hi guys, my arowana is spitting out black string like poops. He also has mouth fungus, but it's cured. He is still in the hospital tank, but after a few observations. I saw him threw up poops.... I thought he ate his own poops and threw up, but I saw black string like poops coming out of his mouth like several time today. I think it's an internal bacteria infection, so do you guys know any good internal bacteria medication?