I really cannot stand it but our swimming pool is starting to become green again. If you do not pay attention only briefly it is too late. I have forgotten to add some chemicals against algal a few days ago and immediately the algal strikes. But as you know one strike is not equal to win and they do not know me yet. Here I come with my natural biodegradable, good for plant and animal, and this should give a strike back to the algal. Is not algal a plant or an animal? I wonder if it is really good for plants and animals, can it kill the algal in our swimming pool. We only know if I try it and wait for a couple of hours to see if the algal will disappear.