CPR Aquatics Cyclone Bak-Pak 2 Bio-Filter (Excela Pump)

CODE: CPR02071


In Stock

BAK-PAK? 2 Bio-Filter

The BAK-PAK?2 Bio-Filter is the second generation external, hang on the back, combination Protein Skimmer and Biological Filtration unit from CPR. The BAK-PAK? 2, like the original, is designed for tank sizes up to 60 gallons. Water first enters the Protein Skimmer column from the aquarium and then flows through the biological chamber filled with Bio-Bale? filtration media before returning to the aquarium.

The Protein Skimmer is driven by a rejuvenation venturi Powerhead. Bubble dwell time is increased by the counter-current flow in the skimmer column. The quality of the foam collected can be controlled by raising and lowering the collection cup.

To set up the BAK-PAK? 2, hang the unit behind the aquarium and plug it in — that's it. New improved design incorporates an easy to clean intake tube and an enclosed, directional outflow to reduce salt splash and micro-bubbles entering into tank. The new design also uses a smoke colored break-resistant collection cup.

BAK-PAK? 2 Bio-Filter Features:

  • Rated Aquarium Capacity: Up to 60 gal
  • Skimmer Body Size: 7.5" wide, 3" deep, 17" height
  • For saltwater fish only tanks up 60 gallons. For Reef Tanks, check out
  • For saltwater fish only tanks up 60 gallons. For Reef Tanks, check out
  • Overall dimensions: 7.5" W x 6.25" D x 19.5" H


CPR is pleased to announce an exciting new enhancement to our popular Bak-Pak protein skimmer line.

The new Accela pump is similar to the Maxi-jet 1200, however, it includes some important added benefits. The pump has been modified to include a venturi intake which efficiently draws in more air with less restriction on the pump. This results in more effective protein skimming with a significantly increased "sweet spot" for skimmer operation.

Accela Pump Features and Benefits:

  • Increased air to water ratio
  • Less restriction on the pump results inlonger pump life
  • Modest power consumption- 20% less than the Maxi-jet 1200
  • UL listed with a 6 ft. grounded plug

What's Included:

  • Skimmer Body
  • Accela Pump
  • Outlet Assembly
  • Inlet Assembly
  • Bio-bale Filter Media
  • Collection Cup With "O" Ring And Lid
  • Bubble Eliminator
  • CPR Aquatic
  • http://www.cpraquatic.com
  • In Arcata, located in Northern California, the sea is a way of life. From the advanced Marine Biology department at Humboldt State University, just up the hill from us, to Humboldt Bay, about a mile west, we're fortunate to be in a perfect environment to develop equipment for marine aquariums. CPR was started in a small garage in 1987 to produce biological filters for local aquarists. People who used CPR filters were impressed by the high quality and affordable prices. Word spread, and we grew. Since then, we have expanded to a 10,000 sq. ft. production facility and have developed the innovative product line you see here. We're adding new ideas all the time. Our basic goal is to allow you to put the highest performing systems in your customers' hands at reasonable prices.

  • More products by CPR Aquatic


CPR Back-Pak 2 Protein Skimmer User Manual (bakpak.pdf, 281 Kb) [Download]

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