GMSgrowsanswered grow question 5 years ago When in soiless it is important to water feed water feed etc. When feed feed, salts build and build. Check the ec in the runoff after you water. If it is much higher than what you feed it will create lockout. So yes, your plants will stop taking certain elements in your nutes. If you haven't got an ec reader I recommend one highly. Essential for trouble free grows