Ecological Labs 1 Quart Microbe-Lift PL:Creates a cleaner environment for your pond, promoting faster fish growthReduces ammonia nitrogen levelsDissolves away organic sludgeSeeds and maintains biological filtersSignificantly reduces noxious odors caused by dead algae, fish fecal matter and urineReduces hydrogen sulfide, which creates strong, offensive odorsReduces biological oxygen demandReduces buildup of bird droppings, fish feed and dead leaves