PF-3 BIOFILTER PF-3 BIOFILTER $109.99 SKU: TET16781 QTY: Click here to save 5% off of your order! PF-3 BIOFILTER Trickle filtration and Bio-Ring media create an optimum enviroment for natural ammonia-digesting bacteria.  Fine and coarse mechanical filtration material remove debris. Activated carbon pad removes odors and i mproves water clarity. Venturi, overflow, and internal spry systems enhance and protect bioactivity. Modular construction allows connection of additional filters in parallel to accomodate ponds up to 2400 gallons. Fittings are 3/4, 1, and 1-1/4 to accomodate any pump or UV clarifier via hose or tubing.