What does PPM, EC and TDS mean?
PPM stands for parts per million, and is usually referenced to TDS or total dissolved solids. Distilled water contains a very low ppm compared to tap water which contains minerals and chlorine. EC stands for electrical conductivity, and is another way to measure how much nutrients are in your solution. What does PH have to do with hydroponics? The ph will determine how acidic or alkaline your reservoir is. The ideal range for hydroponics is around 5.8. At 5.8 it allows for maximum intake of all essential nutrients the plant needs. Too high of a PH and the plant cant take in the most important primary nutrients, too low of a ph and the roots cant absorb the water properly, and will also affect key nutrient uptake.
