I'm currently growing 3 White Widow Autoflowers. Growing in FFOF soil. I'm at 5 weeks and I've only given the ladies two LIGHT feedings thus far. Nothing out of the ordinary. My plants look healthy and green. Whenever I water or feed, I PH my RO water to 6.5 or less. My run off is always around 7.0. Is there anything to be concerned about? I'm just trying to get a feel for growing. I did a flush to see if it would drop the PH. Nothing changed.