Key factors when selecting fertilizers
In hydroponics, it’s absolutely essential to begin with a laboratory analysis of your water. The three main things to note are the alkalinity, the electrical conductivity (EC) and the concentration specific elements. Alkalinity is a measure of water’s ability to neutralize acid. Alkalinity is usually reported in terms of ppm of calcium carbonate equivalents (CaCO3). Alkalinity values may range from near 0 (in very pure or reverse osmosis treated water) to more than 300 ppm CaCO3. The greater your water’s alkalinity, the more the pH will tend to rise in your nutrient solution.