Mills CalMag is an additional supplement that may be useful for those living in soft water areas or if you are using reverse osmosis water. Using water from these sources could mean your plants will lack a decent supply of calcium and magnesium, both of which are found in hard water areas. Many growers find that using coco coir can also make them need a boost in these elements due to the natural properties of the media.
Mills CalMag hardens soft water and fills in the deficit in the nutrient profile. It raises the EC of your water to the correct range so that when you add your nutrition, you’ll have a balanced plant feed that will give plants everything they need to thrive and be healthy.
Alternatives to Mills CalMag
At Straight Up Hydroponics, we have a wide range of CalMag alternatives from different manufacturers. RAW have a powdered version, Canna have separate calcium and magnesium bottles, others include nitrogen and other elements to assist plant growth! All of our additives are on our website under the “Nutrients” section, which you can reach by clicking here.