– Release tannins into the water which help prevent bacterial growth in shrimp.

– Acidify the water which will slowly lower the pH level

– Shrimp will also eat the cone as it breaks down

-Bio-film will accumulate on the cone which is another great food source for shrimp.

– Ideally add boiling water and leave overnight and/or rinse before adding to your tank.

– 1 cone for every 15l of water

– You may add or replace as

and when needed. (3-6 months)

– For more information re this and other