I gotta run (dinner with my Pops, woot!) but read up on that, and the link in my siggy, and this one:
http://boards.cannabis.com/plant-pro...hy-how-do.html
I should change the title because it's not jut about pH; it's also about flush technique. You DEFINITELY need to flush right away.
What are you using for a pH tester? The metal probe ones they sell at Home DePOT for $10 are no good.