PH in/out issues

[OldManGrower]

Hey Bud Masters, I grow in soil. My PH in is 6.5-6.75 but my PH out is always 6.1-6.25. No matter what I do I cannot seem to raise the out flow numbers. I tried a watering at PH of 7.0 but the outflow never exceeded 6.25 and I saw signs of a deficiencies. I would ignore the whole thing, but I feel my leaves are somewhat light in color with some yellowing.. My nutes if it matters is GH trio at .75 dose plus silica and Calmag at full dose. Temps in my tent are in the high 80-90 degree and there is not a whole lot I can do about it. All the plants were picked for their heat resistance. Any ideas on how to raise the PH at the roots?

 

[Bluey]

Bit of dolomite lime lightly sprinkled across the top of your soil or a a teaspoon to your watering can. That will give it a cal suppliment and raise pH at the same time.
Edit. Post a pic or 3 please

 

[Rwise]

Yes do that!

 

[Bowhunterwoody]

I had the same issues for a few grows and after reading Going2fast mention mixing a little dolomite lime directly in the soil before potting it's been good.