Ghost and Amano look alike, and reach about the same size. The difference is the L shape of ghost, and dirt cheap price. You can get 10 ghost for a dollar, so it’s not worth to breed them. It costs $5 per Amano, so it is worthy to breed Amano except the effort is too tedious to worth it. Takashi Amano has 100s of Amano in his tanks, so there must be cheap sources in Japan. OP has a good question. If ghost is so similar to Amano and can eat algae, why aren’t they be kept together.