I just added some fertilizers to my tank. Suddenly 2 of my 7 rummies are hanging out at the top not acting normal at all, listless. The other 5 rummies are fine, schooling and eating. Did these 2 somehow get hit with the fertilizers in a bad way?? What can I do? I'm hesitant to think a water change would help as all the rest of my fish, including my fry are acting normal.
