the oil you see is from fish food. its like a protein slim, it is harmless and if you would like to remove it, just add more surface movement. as for
Bump need them gone
like i said, sunfish, blue gills, pumpkin seeds, all of them are one of the nastiest fish i have ever kept. they will kill anything once they get big
i would still consider the oscar. they get nasty, kinda like that old grumpy man, with age, he might think that the pretty peacocks are in his way, and
But the thing is I'm not cleaning them WEEKLY -- more time than THAT goes by that I'm not seeing all that much discoloration...