API® Prevent Algae

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PREVENT ALGAE filtration media is scientifically proven to remove phosphate and silicate


  • Eliminates cloudy water

Follow API Easy Care Guide and use PREVENT ALGAE when:

  • Addressing Water Solving Problems to reduce phosphates

PREVENT ALAGE can enter the aquarium in fish waste, decaying organic matter and tap water.  High phosphate in the aquarium can cause water clarity issues.  Phosphate can be reduced with PREVENT ALGAE, a phosphate-removing filter media.  PREVENT ALGAE comes in a specialized convenient pouch that eliminates cloudy water caused by phosphate and silicate.  PREVENT ALGAE removes these common nutrients and enhances the growth of hard and soft corals in saltwater. PREVENT ALGAE also removes compounds that inhibit plant growth in freshwater aquariums.

When to use: When testing indicates the presence of phosphate (greater than 0 ppm / mg/L) or silicate (greater than 0.5 ppm / mg/L).

Rinse pouch under tap water for several minutes to remove dust and activate the PREVENT ALGAE.  The activation process will temporarily generate some heat.  Place pouch in path of water flow in the aquarium filter.  Replace pouch every 2 months or when testing indicates the presence of phosphate or silicate. 


Item #:                                 Treats:

RE-727  Size 5                     Up to 75 Litres

RE-727A Size 6                 Up to 210 Litres


Other PREVENT ALGAE filtration media:

For API nexx™

  • Item # FR-777A PREVENT ALGAE Size 4 (2 pack)



Regular Care