24 COMPATIBLE WITH BIORB SERVICE KIT REFILL REPLACEMENTS FILTER FOAMS ORB
FILTER FOAMS AIRSTONES COMPATIBLE WITH BIORB TANKS HIGHEST QUALITY AIR STONE. COMPATIBLE WITH BiORB ANTI ALGAE FILTER SERVICE KIT REFILL & CLEANING PAD. 5 x Compatible With Biorb Filter Service Kit and 2 x Compatible Biorb Air Stones.