ANS Sinopore Max (10mm) 

• 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