The Hikari Sinking Wafers have also been revised and improved, and the tasty aromatic discs are now more soft and have a smaller diameter. Ills are even easier to consume by the small inhabitants of the bottom like Corydoras, Botia and Loches. - Quick immersion wafers for small background fish. - Easy to eat because of its small shape and its soft texture. - easily digestible and supports the immune system.