First is because i have extremelyy hard water where i live annd i used my tap on my first grow and had a lotta issues that were related to hard water and some kind of high mineral i forget what he called it content.. I switched to bottle on my next grow and i would never go back to tap.. Second i ONLY foilar sprayed them twice with a VERYY diluted epsom salt solution which i did only after i did a lot of research on the problem im experiencing so dont go trying to make it seem like im just winging shit over here based off of what one or two people say.. but thanks though