The water in the pond was polluted after winter by leaves and dead plant matter and I did not get time to clean so it came as it had to - the water was cloudy and after the first warm days the growth of algae began in unimaginable speed. Ordered 3 weeks ago algo and used immediately upon receipt. The success came as after about 1 1/2 weeks and now everything is crystal clear and the fish it's also fine.
I have additionally a means of haven used against the mud which has certainly helped with anything else.
Conclusion: The product is highly recommended and acts exactly as described in the correct dose.