HELP!!! Just a follow up to the above. I checked the level of nutrients and the ph in the runoff water from one of my plants, and the ph was 5.9 (tap water here is 7.2ish) and the ppm was off the scale! (> 2000ppm). I'm in the process of flushing all of my plants which gets the ppm down to abt 1100-1200. Is this sufficient, or should I try to get it lower. Sorry, this should probably be in the plant problem section, but I'm too busy flushing to care right now.