HEAVY DUTY POND CLEANER. Specially selected bacterial strains in POND-ZYME with Barley immediately being breaking down fish waste and dead algae that cause cloudy water, sludge build-up, and debris that clogs pumps and filters. Through enzymatic action, POND-ZYME with Barley reduces pond maintenance and keeps pond water clean and clear. POND-ZYME with Barley is 100% natural product, safe for all pond fish, plants and wildlife. Key Benefits: Cleans and clarifies pond water Starts working in minutes Eliminates troublesome organic sludge and debris Treats up to: 30,280L Instructions: Initial dose at Spring start-up and end of season dose: add 4 teaspoons per 200 gallons of pond water twice a week for 2 weeks. Maintenance dose: add 2 teaspoons per 200 gallons every 2 weeks. Frequently Asked Questions: Is API POND-ZYME™ SLUDGE DESTROYER™ bacterial cleaner safe to use with small fountains and ponds? API POND-ZYME SLUDGE DESTROYER bacterial cleaner can safely be used in ponds and fountains. Is API POND-ZYMETM SLUDGE DESTROYER™ bacterial cleaner safe to use with domestic animals? While API POND-ZYME SLUDGE DESTROYER bacterial cleaner can safely be used in a pond environment and will not harm mammals if they drink from or swim in treated water, it is only intended for use in ponds with fish and pond plants. Should we turn off the pond pump to give API POND-ZYMETM SLUDGE DESTROYER™ bacterial cleaner time to sink before the skimmer pulls it in? The pump should be left on when using API POND-ZYME SLUDGE DESTROYER bacterial cleaner