Sorry you lost your fish.
As others have said clove oil is pretty safe to use IF you know what you are doing. You do have to watch for gill movement , how fast the gills are moving, and make sure you put the fish into a different tub with air and pond water for recovery.
I use anywhere from 8-10 drops of clove oil for each gallon of water and mix it with pond water in a plastic jug before pouring into the sedation tub.
Are you sure it was 100% clove oil?
,Karen
Charter member #57
My motto: Trust No One