1 x 1L Sensi Coco Grow A+B. However, with pH Perfect Sensi Coco Grow and Bloom you'll eliminate pH checking forever because of the proprietary "pH Perfect" technology it uses. What’s more these specially formulated Coco Coir nutrients account for the high levels of potassium already present in Coco Coir so you avoid any possibility of potassium toxicity.
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