Lotus Pro Series Cal/Mag is a premium source of the two most readily absorbed secondary nutrients, integral for balanced and healthy growth, essential for coco based grows. Its ideal blend will prevent calcium/magnesium lockout in your grow. It will also double as a great foliar spray or root zone application.
Dont let the size fool you. You get about Tripple the volume of the product vs the same size in liquid nutrients. Great price for sure!