Sterabai Cory's are amazing. They work all the time - very active. They would appreciate the substrate grains without sharp edges. Their sensitive whiskers will track any debris or food leftovers. When in good conditions they will get a red stripe or even yellowish color of body and fins like on this picture. Usually they are just black and white with a little red to it, depends on the light you use. They like to be in a group of at least 6. Doesn't grow very big and very fast, but it depends on aquarium size. If somebody knows any breeders with them please let me know. Thanks