Advanced Nutrients Sensi Cal-Mag Xtra is a unique formula that helps your plants grow healthier and stronger. It is designed to provide your plants with an optimal balance of both calcium and magnesium for maximum absorption and increased yields. Calcium and magnesium are both essential nutrients for plants and are critical to the development of strong roots and stems. Sensi Cal-Mag Xtra is designed to give your plants the exact amount of these two nutrients they need to reach their full potential. The formula is designed to help your plants absorb the nutrients quickly and efficiently, and helps to ensure that your plants get the maximum benefit from the nutrients. It contains no fillers or artificial ingredients, so you can be sure that your plants are getting the best nutrition available.