I just looked at the chart that bonger posted and it says P is available from 6.1 to 5.8 so I'm still kinda confused I thought P was the main nute for this stage of growth...if ya could help explain the basics bonger I'd appreciate it...I've been measuring in the water of my res to get the readings as a heads up.

I was thinking maybe ya need 5.2-5.5 like Zandor said in the res cause when you spray the solution in mix with air the ph goes up or somethin so at the roots if they aren't just hangin in the water it will even out to the right ph...I'm gonna keep looking for info but if anyone knows just offer it up

ok now I'm out for real...