Provides potassium and trace elements, which are depleted faster than the other nutrients essential for plant growth. Dosage: Daily about 1ml per 10l of water in the aquarium Example: 7ml (one nut) on the aquarium 60l (eg. measuring 60x30x36) 21ml (3 nuts) on aquarium 180l (eg. measuring 90x45x45) Adds essential nutrients to your tank Contains valuable trace elements.