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Monscine-
I am still waiting for a response to that question from a science and cobalt product supply and research company. They make it for use in color enhancing fish foods and human health products. On their site is a explanation of it and how many ppm it takes for a plant to be able to take it up and turn it into red pigment. But that is for soil and not plants, not water and koi. So it looks like after thanksgiving at this point. Maybe even next week if they r chillin for the whole weekend.
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