Microbe Lift OPC - Oxy Pond Cleaner helps break down all of that debris! Ecological Laboratories Oxy Pond Cleaner will safely and immediately breakdown accumulated debris from rocks, streams and waterfalls.Uses oxygen power to breakdown unsightly debris!Especially helpful on streams and waterfallsDeep cleans planters and rocksOxidizes and detoxifiesHelps prevent pond odorsUse weekly to help remove stressful pond drainingPlease refer to Alternate Images 1, 2 and 3 for Weekly Maintenance of Debris Application, Light Accumulation of Debris Application, and Heavy Accumulation of Debris Application.NOTE - Ammonia levels should be checked for two days following applications of all oxygen release compounds as they can kill beneficial bacteria in ponds which can result in a an ammonia or nitrite spike.