The CPR Aquatic Bak Pak Bubble Trap Box, Clear, works with the CPR Aquatics Bak-Pak 2R+ Reef Ready Protein Skimmer and the CPR Aquatics Cyclone Bak-Pak 2 Bio-Filter Protein Skimmer. If used with the Bak-Pak Dual Pak Protein Skimmer you will need one Bubble Trap Box for each of the two returns.
