Avoid deficiencies when growing in coco coir - and say goodbye to annoying pH meters! The pH Perfect Sensi Coco Bloom A+B from Advanced Nutrients is the ideal solution for optimal growth of your plants in coco substrate. With the patented pH Perfect technology, the pH value is automatically kept at the right level without you having to measure or adjust. This two-part fertilizer provides the right amount of potassium, chelated forms of magnesium and calcium, and various chelated forms of iron to prevent nutrient deficiencies and provide your plants with optimal nutrition.