Microbe-Lift PL Ponds & Lagoons Water Clarifier 1galSpecially Formulated for Decorative Fish Ponds, Lagoons & Smaller Water Features. Creates a cleaner environment for your pond, promoting faster fish growth. Reduces ammonia nitrogen levels. Dissolves away organic sludge. Seeds and maintains biological filters. Significantly reduces noxious odors caused by dead algae, fish fecal matter, and urine. Reduces hydrogen sulfide, which creates strong, offensive odors. Reduces biological oxygen demand (B. O.