Lefunpets - Filtro de esponja bioquímica para cría de camarones Betta Nano tanque de peces para acuario peces 5 gal-25 gal-25 gal-25 gal-25 gal-Perfect For UseSponge filters provide biological filtration, air powered, works great without noise and for longer life. Soft Sponge MaterialUnique cylindrical shape 6 vertical stripe sponge design, traps floating debris and won't suck up your fish. Easy To Operate Using an air hose, connect one end to you air pump and the other end to this filter,and equipped with a check valve on air hose, to prevent water backflow and air pump damage due to power