A two in one product! Breaks down sludge, organic stains and biofilm in hydroponic systems. When used in new systems, helps prevent organic buildup. Renew! helps keep aeration pumps and lines unclogged so they perform at maximum efficiency and also acts as a fertilizer, helping plants have better nutrient uptake so they produce more foliage, fruit or flowers. Renew works during all phases of growth, from seedling to harvest.