Eco Labs 971047 10PLG4 Microbe Lift PL Bacteria for Watergardens Gallon Creates a healthy environment for you pond promoting faster fish growth Reduces ammonia and nitrogen levels Breaks down algae Specially formulated for fish ponds decorative ponds and lagoons Made in the USA Creates a cleaner environment for your pond, promoting faster fish growth Reduces ammonia nitrogen levels and dissolves away organic sludge Seeds and maintains biological filters while significantly reducing noxious odors caused by dead algae, fish fecal matter, and urine Reduces hydrogen sulfide, which creates strong, offensive odors Treats 5,000 Gallons for 21 Months