Arjuna Pods x 16 - an uncommon Botanical as shown in the picture. - Arjuna Pods are a unique large and light botanical They are benficial for their tannins (recommended to lightly boil first, the longer you boil the more tannins you will lose. It I'd also a great place for the growth of biofilm. They have many nooks and crannies so that there is always food that only baby shrimp can get too. Boil 5-10 minutes before use, the longer you boil the more tannins you will leech out. (they may tint water slightly but tannins are beneficial for all aquatic life)