Black Alder Cones are a botanical favorite of shrimp keepers and aquarists. Not only are they aesthetically pleasing, they are beneficial to organisms that feed on biofilm.
Rich in tannins, promotes biofilm.
Directions: For aquaria, soak in water until it sinks. Boiling may help it sink faster. For terrestrial use, no preparation needed.
Size: Contains 20 cones. Size of each cone roughly around 2.5-3cm.