... : 10x7, 10x10, 12x10, 12x12, 25x9, 25x10, 25x12mm. 1. Product DescriptionBio media is a new suspension bioactive carrier, it according to the ... customize according to customer requirements.4. The technical indices of Bio media: SpecificationmmΦ25X12Φ25X9Specific gravityg/cm3>0.96>0.96Heaping numberPCS ... º CNH4-N Elimination rate%9999Life-spanyear≥10≥10PH5-115-11 Bio media for aquarium