The CPR Bak-Pak 2R Hang-on Protein Skimmer for Reef or Fish tanks up 30 gallons. . No need to purchase an overflow or return pump, the Bak-Pak 2R+ simply hangs on the back of your tank.
Includes Pump Easy to setup, easy to use, easy to clean.
Bak-Pak 2R+ Reef Ready Protein Skimmer
Size: 7.5" wide, 3" deep, 17" height