Karis Bio Sponge XY-1811, 64x12x2cm -Special interlayers structure. -The middle layer provides large surface for nutrifying bacteria living, purifies water, make fish less sickness and death. -Filter mat comes with the latest technology, advanced environmentally friendly materials,beautiful durable and easy to clean. Karis Bio Sponge XY-1811, 64x12x2cm -Special interlayers structure. -The middle layer provides large surface for nutrifying bacteria living, purifies water, make fish less sickness and death. -Filter mat comes with the latest technology, advanced environmentally friendly materials,beautiful durable and easy to clean.
