I know that 80g isnt big enough for 3 full grown oscars but i have another 100g that im nursing a pacu back to health and finding him a new home. I figure the 80g is big enough for these 3 right now as they arent full grown yet. There isnt any bullying goin on they all get along well. Im going to do water changes daily and see if the melafix works
Well this morning i noticed that his eye was not bulging anymore , so i take a closer look and he now has no eye and there is a huge hole where his eye was and i can see inside his head, what should i do

he seems very lifeless and one side of his body is missing a huge amount of scales

Good morning. I've merged your posts to save some space.
Thanks!
Ken