Remove the adsorbent materials (such as active carbon). Shake before use. Dosage: 10 ml per 50 litres daily over the course of 5 consecutive days.
The cyanobacteria disappears within 10 days after the last dose. As from the first dose, until 14 days later, do not replenish or change the water, nor make use of adsorbents.
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I had some very tricky requests when I installed my pond, but Majestic stuck with me until I got it right. Its so good to find some good old fasion service still alive today. - Darryl Ward