It's not too bad, but it's starting to slowly get worse. I've been feeding with the recommended dose of 2 teaspoons of FoxFarm Big Grow ever other watering, so for example, if I feed on a Monday, I might water on Wednesday or Thursday, then I might feed again on Friday or Saturday respectively. I PH the nute/tap-water mixture and I PH the tap-water before giving it to the plants... The PPM level of my tap water holds suddy at 100PPM (+/- 5). Any thoughts?