Pond Stability, 500 mL / 17 fl. oz. New pond stabilization system; Rapid and safe establishment of biofilter; Prevents and reduces sludge Rapidly and safely establishes the pond biofilter in new ponds, thereby preventing fish deaths due to incomplete biofilter cycling Formulated specifically for the pod and contains a synergistic blend of aerobic and facultative bacteria that facilitate the breakdown of waste Non sulfur fixing bacteria that will not produce hydrogen sulfide; Controls ammonia, nitrite and nitrate 1 Liter treats 445 US gallons in new ponds; 1 Liter treats 4200 US gallons in established ponds