1400ppm at week 10 is not bad at all.... It might not be a ph issue. Your water source has been ruled out. And you say veg is no prob....how often do you flush? How often do you feed? And how often do they get plain water, no nutes?

To get the best responses, I think you may want to fill out the troubleshooting form so we can see your way and let you know where you are going wrong....

I think it would benefit you more if you were to search "ph nutrient chart". You will find many sites, some charts and they all have the same basic concept, your ph needs to be in a certain range for proper nutrient intake......

Troubleshooting form is in the plant problems section, in case you didn't know....

CGI::::::

( Glad to see you back Rusty Trich:thumbsup: )