I hear that these days many breeders do not cull their juvenile discus fish that have defects like not round shape,large eyes,poor colors and instead sell them cheap. On the other side there are petshop selling discus fish which are 2 or 3 times the price but are genetically stronger and survive better with better coloration and smaller eyes and perfect round shape. In my area there used to be a shop which used to import discus fish from Malaysia, Singapore in the 1990s and I kept them. If I remember they were prettier and stronger than many of those local bred discus here in India. Offcourse there are few importers of discus IP and the importers tell me that in IP discus there is no B grade or C grade discus. It's only A,A+ or A++. Is this true.