The American Hydroponics 27.7 CF Calibration Solution is the solution for calibrating your hydroponic garden with confidence. This 27.7CF solution also calibrates EC to 2.77.
About American Hydroponics
American Hydroponics are a large-scale commercial and hobby centered organization geared toward an all-natural, environmentally responsible way of growing plants and vegetables. With that in mind, they are committed to hydroponic growing, which uses less water, fewer minerals, much less space, and produces no media which needs to be disposed. Their work has taken the cause a long way from where it started, and you are sure to see them at the forefront of this movement for years to come. Naturally, because they are such leaders in disseminating the practice of hydroponic gardening and farming, their products, and those they endorse, can be considered top quality.