The POLY-FILTER is for filtering and purifying both fresh and salt water aquariums. It is a formulation of a special patented material bonded to a synthetic matrix. By means of a unique proprietary process, the POLY-FILTER is made impervious to salt and is also organic loving to certain materials. It can absorb and adsorb contaminants and other toxic materials found in nature or added to fresh and salt water with or without fish and invertebrates. Medication added to fresh and salt water aquariums for treatment of diseased fish will automatically be removed by the POLY-FILTER after serving their intended purpose before the medication can produce a toxic effect on the fish.
 
The POLY-FILTER is non-toxic and harmless to biological filtration because it allows a sufficient amount of ammonia to reach the biological filter in order to sustain the bacteria culture. The POLY-FILTER provides a supplemental means for removal of ammonia when the biological filter is unable to break down the excess ammonia and its concentration increases rapidly. Then the POLY-FILTER adsorbs the excess ammonia while the biological filter readjusts to higher ammonia input levels.
What does a Poly-Filter remove from an Aquarium?

Poly-Filter sorbs excess organics such as amino acids, proteins, lipoproteins, dissolved organic matter, all forms of phosphates, tannins & humic acids and related complexes. Poly-Filter also sorbs volatile organic chemical such as chloroform, bromoform, benzene, phenols and organophosphate insecticides/pesticides. All metabolic wastes are sorbed by Poly-Filter.
 
Poly-Filter turns color when removing medications. 
Aqua to Dark Blue: Copper or Copper salts
Orange: Iron
Bright Red: Aluminum
Bright Yellow: Ammonia, Amines or Solvents
Methylene Blue: Pale Blue
Malachite Green: Light Green
Tannins/Humic acid: Dark Brown
Organic Wastes: Light Tan progressing to Dark Brown