, until your runoff comes out the same as your pouring in, will effectively raise your soil PH, assuming you've been careful to flush it evenly, cleaning all the soil. I use 4 gallon pots, and have found that it takes 8-10 gallons of water to do this, although some recommend 3 times the pots volume. More won't hurt, if you choose that route. Also, I like to add 2 tbsp of dolomite lime, per gallon of water, to the last two gallons I pour through. That allows the lime to soak down through the medium, and hold the PH in check, for an extended period of time. I like to do it at the beginnng of 12/12, because then my PH will not be a problem, through flowering, where the magic is made.lol 
Read the chart..LOL
i saw the chart years ago. it doesn't say what he fed/watered at. optimal for soil is 5.8. if he ph'd at that level, he'd be fine. as long as he flushed regularly, or allowed for sufficient run-off when adding feed/water. with ph, as long as you ph everything that goes in/on your plants, you should be good.
Dude or chic,,,Is that your avitar? Nice Buds....But is that a Bruise on the Leg or a Anoculation?
Yeah man, time to bring it up, before it get's worse(and it will). Flushing it with water PH-ed at around 6.5(I like to use 6.5-6.
