A biological filter is installed to make up for the unnatural conditions that occur in a backyard pond (i.e.  low circulation and aeration, high pollution and low oxygen).  Fish waste, uneaten fish food, organic material, and algae contribute to pond pollution and sludge.  This waste must to be broken down and removed from the pond to reduce stress to fish.

Filters are designed to allow large colonies of purifying bacteria to operate effectively in small volumes of water.  The secret to successful filtration is agitation and oxygen.  In a well agitated/aerated pond you will see major improvements in pond filter efficiency.

The BEST filter system consists of three components:

  • Filter - mechanically/biologically removes dirt and dissolved waste
  • Ultra Violet Clarifier (UVC)- clears green water
  • Pump - solids handling to remove material from the pond into the filter