And people say there is no use for carbon. I wont repeat advise already give I will only say good luck I know how it feels to lose fish to a mistake like that. Made a careless action once but i got lucky. We had a bug problem and had been spraying the baseboard, well it had been several days and I saw a bug on top of my tank. I was just angry about the whole bug situation and said forget you bug and flicked him to my O who ate him the second he hit the water.
I almost freaked out as soon as I did it because what if he had bug stuff on him.
but lucky was on my side and I pray on yours.