Pond-Vive Liquid Lake & Pond Bacteria is the natural biological way to revive your pond. Similar to Pond-Vive powder, can be used to treat golf course ponds, farm ponds, municipal areas, etc. Works to remove ammonia, nitrates, phosphates and sludge. Two gallons will treat 1/4 acre pond for 10-16 weeks. Available in 1 gallon, 55 gallon drums, and 250 gallon totes.