タイトルまたは説明

This media was firstly invented to replace the sand filter which was widly used for swimming pool, spa, aquarium, ponds.  Because of the unique shape, this media can decrease the pressue loss even if you use them for a long time.
Now this media is sold as aquarium products.
The feature and characteristics are as follows
protect baby shrimps from being sucked by fllter systems and cannibalism
easy to propagate vacteria and functioning as filter media
material: PVC and does not influence on the quality of water
*0pcs x*0cases/box
*0pcsx*5cases/box