Due to the individual dosage possibilities, these are suitable for small fish such as guppies, bettas and their young, as well as for large and biggest fish species such as tetras, discus, angelfish and perches. Adapted to the amount of fish and water, the shaped portions sink to the bottom and are thus accessible to all bottom dwellers such as catfish, shrimps and snails. As a small ball, the portions are excellent for sticking to the aquarium glass, making them easily accessible to open water fish.