The Importance of EC & pH
It is the most important thing to get right. No matter how long you spend choosing a nutrient, if you don't know how to maintain the correct EC and pH levels in your nutrient tank then your plants simply will not be able to absorb them. The vein structure running through the roots, stem and leaves of a plant simply do not work with liquids outside the tolerable zone. So get yourself savvy on the subject and invest in some metering equipment.
For the best metering equipment in the industry visit www.nutrientmeters.co.uk