Sure doesn't sound too strong....somebody mentioned people who go up to 2000 ppm/ I never would.....that just sounds scary. I know X-C had some ph issues recently with ph dropping. All I can say is I've honestly not seen it get lower with too strong of a solution.....always higher. I was telling him I had read somewhere....sometime....an explanation for that but of course I was blazed at the time and can't remember what it was. I've really only had that issue once and couldn't tell you what it was due to....eventually the problem just stopped but honestly if anything my nutrient solution at that time was too low...I had to deal with a copper defeciency to deal with as well when I switched to bloom nutes.....did you switch over recently?