Yup...1. Are you using Amoxicillin or other antibiotics to treat corals or other livestock?
2. What have you used and what were the results?
My chickens . (That would be 'other livestock', right?)
In my tank? Nope. Was always told that antibiotics can be harmful to our bio filter. Might well be one of those old saws with no basis in truth... I wouldn't have a clue.