For the removal of thread algae in ponds, streams and shallow water zones. Thread algae are a major problem in ponds! NOT ANYMORE! We developed for you the environmental high quality solution for the specific control of thread algae! ONLY the ORIGINAL ONE developed by us in the economic sprinkler allows a specific dosage for the successful removal of thread algae. 500g of the granules are sufficient for max. 10.000 ltr.