Soil ph high

So after doing some more research on Dyna Gro in forums on other sites I better understand what the issue is. So yes the soil is way to low. Yes watering to much with runoff. Also applying nutes with their feeding schedule at every feeding in the beginning. Then alternating water and feeding later in. Ph balancing every feeding and water. All of this is in their recommended feeding schedule on their website for soil with waste draining. Now that being said it leads to too much P and causes Nitrogen deficiency. According to a guy that had been using it for about a decade and found out through lots of trial and error that in soil you should use about half the recommended dose one time a week with watering every time in between. Tweeking the mixtures up a bit along the way to avoid any issues. Obviously using a meter to check ppm going in each time (which I currently don't have but working on getting). Anyway so the question is, 3 weeks into flower, all show Nitrogen deficiency and older fan leaves yellowing and dying on quickly. Do I flush and then start back with correct nutes or ride it out just going with correct feeding and watering from this point forward?

6.7 is the sweet spot. But from 6.3-7 works to.. but as said, organics typically hold a higher ph.. and don't need adjusting with some. But your soils PH is what it is. You shouldn't be trying to get run off regardless. Any input will be what it'll be with soil. You'll never get a true PH from flushing soil.

Also, organic nutrients like your top soil. That's the typical PH pal. It really doesn't come into play with full organic nutrients that much in a full benifical soil sub. For instance the Bioenhancer Green House Feeding does when you mix that with water. The ph is 9+. And it says on the package if used with coco (light mix soil) it needs to be PH'ed. The place that makes that stuff know what they doing. As I said. Fully organic / dry powders typically hold a ph really high due to their organic background and no ph buffers..as that would make them non organic..

I thought you wanted the soil to be around 6.5, the sweet spot of soil? Maybe I called it wrong. I water my air pots slowly till its runs out the bottom and the tray holds about 10% of what the pots are. Did this to make sure feedings go all the way through as to not have a buildup in the soil. In doing so the tray holds runs 7.0 on some that are doing OK and 7.5 on one's not doing great but still growing slowly. I know that's what the soil is, so that's too low? What should the soil be? Now I'm confused lol.

Your soil ph is way to low If you're getting 7 that's where your soils PH is at. Also, you shouldn't be getting any run off from soil.. 6.8 lowest you should be going is 6.5. But, its too low.

Just to give a little more info, 50/50 topsoil and black cow compost mix. Didn't know in the beginning the compost holds an 8.0 ph. Plan on running 60 organic soil, 10 coco coir, 10 perlite, and 10 earthworm castings next time around for a better soil ph and air flow. But for now, I think I've read peat moss or a sulfate will do the trick, however how much and how long to change? From what I've read about 2 weeks for it to change which would be nearing the end of my flowering. Thoughts?