2 lbs

DUAL BLEND™ The Next Generation of Beneficial Bacteria Gives you all the benefits of Arctic and Summer Blend, in one specialty formulated dry concentrate. Removes Ionized Ammonia & Toxic Un-ionized Ammonia Removes toxic nitrites and nitrates Works in very cold water (as low as 35 degrees F) . Dual Blend™ will improve the efficiency of your filter, regardless of its size, by aiding in reducing…