Xy-2822/2821 Filter Sponge Biochemical Sponge Filter Aquarium Fish Tank Accessories

--Bio-sponge filters provide biological filtration to the aquarium and help stabilize water quality. Increase oxygen solubility.

--Work silently.

--Good breathability and easy to clean.

--The perfect filter accessory for your aquarium and aquarium.

--Size of cotton: 12cm in height, 6cm in diameter