Hikari Tropical Micro Pellets provide a complete diet for most species of tropical fish and are so small they are suitable for even the smallest varieties of fish including minnows and guppies. In pellet form which is easy to measure out and feed. The pellets sink slowly so that fish occupying different levels of the aquarium can access the food. Feeding your fish too much will always result in problems such as unhealthy fish or green water. As a guide one guppy or neon tetra fish will require no more than five to six Hikari Micro Pellets per day. Always follow the feeding guide supplied with your aquarium for best results.