Laguna PowerFlo Max Biological Underwater Filter

The Laguna Biological Underwater Filter is ideal for use in ponds that contain fish. The filter provides the same powerful mechanical filtration as the PowerFlo, plus it features biological filtration with Laguna's patented Bio-Max filter material. The efficient ceramic media provides a huge surface area for beneficial bacteria to thrive. This media will support the decomposition of ammonia and nitrite to less harmful nitrate that can be controlled by aquatic plants and water changes. The end result is that the filter protects the pump from clogging and keeps water clean and clear. The filter can be installed near the edge of the pond for quick and easy access and maintenance.

  • PT-505
  • Suitable for ponds up to 800 gallons
  • Complete biological/mechanical filtration
  • Reduces pump maintenance
  • Reduces pump maintenance
  • Allows for easy access and cleaning
  • Integrates easily with existing pumps
  • Replacement parts available upon request


  • Universal Click-Fit coupling, which allows connections to 3/4, 1 or 1 1/4 inch hosing.
  • Two foam filter pads.
  • Laguna BioMax filter media


$89.95 HG20505
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