package 100pcs = 5 € Black alder (Alnus glutinosa) cones on twigs. Perfect for creating Black Water biotopes. "BLACK WATERS", they are successfully used in aquariums due to: tannin content, lower water pH, light acidification of water, water disinfection, adopted rate is 1 cone per 10 liters of water, and the period in which the cone reflects its properties is about 2 We can directly throw cones into the water or prepare a decoction - flooding with the appropriate amount of water. Especially recommended in aquariums with shrimp where they disinfectant does not harm the delicate shrimp and handles. Additional information 0831456284