Tetra Pond Bio-Filter - replacement filters for the Clear Choice filter system. Provides particle, biological and chemical filtration for your Tetra Bio-Filter pond filter.  Includes coarse and fine filter pads.
 
1 coarse blue pad for mechanical filtration
1 black carbon pad for chemical filtration
Size: 15.5" diameter x 5/8" thick
 
Compatible With: Tetra Bio Filter PF-1, PF-2 and PF-3.