Hey guys a rusty blade I used to cut zoas fell in my aquarium and my guess it was in there for 4 hours. My chalices and candy cane died and my blastos are closed. Everything else is fine, torches Goni zoa shrooms. My yellow tang did develop pop eye though it looks pretty bad. All other fish are fine. I did a 33% water change and dosed epsom salt for the tang. This happened two days ago. One blasto colony is starting to slowly open others are still closed. Is there anything else I should do? Water levels are all good