Star Pods originate from Africa and are used for a variety of purposes in agriculture. The pods are grown organically cleaned and dry in the sun. They provide a variety of benefits to your aquarium include the release of tannins and humic acid. They also make a great mix to any leaf litter substrate. They have a unique esthetic appeal making a great addition to your tank. These will take some boiling to aid in sinking, but will in time. Similar to the Banana Stems they will bloat slightly and have great visual impact.