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Rock and Waterfall Cleaner is the number one way to kill string algae in your koi pond and waterfalls! This 6.0-lb pond algae cleaner can be used as the first line of defense to quickly and safely break down string algae from waterfalls, streams, rocks and other areas where it is growing in your water garden.
Rock and Waterfall Cleaner works by oxidation to provide fast results! Simply turn off your waterfall and stream and sprinkle it directly onto the algae. Wait 10 minutes and then turn your pond pump back on. You will see some results in minutes! More results will come in the days following the treatment as the algae dies. If the algae is at the bottom of your pond, sprinkle Rock and Waterfall Cleaner over the algae area; the granules will sink and land on top of the algae.
Usage rates can vary depending on the thickness of the algae in your pond or stream. Apply a light dusting over algae areas.
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