PondZyme PlusŪ Pond Cleaner by Aquarium Pharmaceuticals
This product promotes the build up of enzymes to eat up sludge and help keep the pond clean.  A 16 oz. (1 lb.) bottle treats 16,000 gallons.
   
8 oz. Bottle
Item # AG146.................................................$ 17.95 btl.
1 lb. Bottle
Item # AG146B.................................................$ 34.95 btl.