My hubby got new discus fish about ten days ago from his father. And along with them, my father-in-law also gave this food, Tetra Bits Complete, for the discus. It comes in a bottle and it’s written that it’s made in Germany, although the writings indicate Chinese and Korean language. It has 25% extra in it. My hubby gave this food once a day for his new discus at first. He said it would need to take time for the discus to adjust in the new environment. After several days my hubby began to feed them twice a day. The food really helps in enhancing their color, really. And although we can’t see the growth yet because it’s still ten days of feeding, my hubby is optimistic that this food is great in helping their growth. Also, my hubby tried to feed his gold fish with this, and it’s good for them too. Compared with our regular food for the gold fish, he thought that this food is slightly better, for the gold fish’s color is slightly brighter with this food. We think that this food is suitable for all tropical fish, and might want to continue using this food for the discus and sometimes for the gold fish.