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We suggest using calcium nitrate (15-0-0 at 275ppm) and mixing with a well-rounded fertilizer profile (such as 10-5-14) engineered for fast-growing plants. For example, GH MAXIGRO 10-5-14 at 120ppm with the Harvest Hero Enhanced Perlite Mix. Mix both solutions and combine the two to make your stock solution. If mixing Harvest Hero products with Coco Coir, add Maxicrop seaweed to color the stock mixture. This should compensate for the high carbon to nitrogen ratio of the coco fiber.