Sinopore
Intensive Bio Ring (Premium!)

-Suitable for freshwater and saltwater use
-High quality sintered glass rings for serious biological filtration
-1L has estimated 1200L/m3 effective surface area for bacteria cultivation, which is 5 times more than conventional ceramic rings.
-Neutral material, do not affect pH
-Use in trickle filter, top filter, sump filtration, pond filtration, internal filter, canister filter