OHF vs spongefilter which is better?

OHF vs spongefilter which is better?

Xehetasun bibliografikoak
Argitaratua izan da:Animal Scene Vol. 16, no. 3 (May. 2016), 62-65
Egile nagusia: Ampil, Angel L.
Formatua: Artikulua
Hizkuntza:English
Argitaratua: 2016
Gaiak:
Aquariums > Equipment and supplies
Hobbyists