Oyster Shells - 20 pieces

20 oyster shells.
Made with oysters from Ariake Sea, Nagasaki Prefecture, a renowned oyster-producing region.
Ideal for filter media or biotope (effective for water purification and preventing water acidification).
Also perfect for saltwater fish.
Boiled and sterilized for immediate use.
(Includes a few extra shells beyond the 20 count.)
Simply place them directly in your aquarium for effective results.
No sterilizing chemicals were used.
Oyster shells, oyster, shells