Normal guppy feces are generally spherical or strip-shaped and black in color. Its feces do not float in the water like those of small fish. Guppy poop is easy to clean, just add some bleach to the fish tank and then clean the tank with clean water.
If a deep cleaning is needed, rinse the inside of the tank with water. In addition, the color of guppy feces is also closely related to the feed fed. As long as it is not long and strip-shaped, it generally does not matter.