help with soil ph..please...

Hello All at RIU!!!

i have a couple questions about my soil ph..if anyone can give some good insight.

first i am growing Nirvana NYPD in fox farm ocean forest. in five gallon air pots..she is about six weeks into bloom and the last week to ten days the big fan leaves have went from nice and green to yellow and burning off the plant as much as a couple a day!! I use tap water but i keep it in a rubbermaid 15 gallon tote with a air stone running 24/7. i feed her boinacare bloom food at about 1/2 strength on a water, water, feed schedule every three days.

ok i ph the water to 6.6 every time, and on the last water i checked the runnoff it was reading 5.9.

i flushed the plant with about six gallons of water,straight out of the tote with a ph of 7.5 and the end result was run off of about 6.6..

my question is what is my real ph now...is it 6.6 or do i use half the difference of the two..7.5-6.6...ph around 7.0???

also what should i ph my water at from now..should i use the 6.6 or continue to use the 7.5??

thanks for any and all advice...LB420

7.5 is way too high.. I try to keep mine at 6.0-6.5.. I would flush it till it's around 6

"The pH scale measures how acidic or basic a substance is. It ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. Each whole pH value below 7 is ten times more acidic than the next higher value. For example, a pH of 4 is ten times more acidic than a pH of 5 and 100 times (10 times 10) more acidic than a pH of 6. The same holds true for pH values above 7, each of which is ten times more alkaline—another way to say basic—than the next lower whole value. For example, a pH of 10 is ten times more alkaline than a pH of 9."

http://www.epa.gov/acidrain/measure/ph.html

you want to set your ph to what neuts your plants need at their stage in life , not all neuts are avalibale to the plant at all ph ranges , keep changeing it and your soil will lock neuts out no matter how much u put in they just wont pick it up