Please Help! Question about lowering soil pH

[ronaldino]

I posted this on another site like this and haven't had any responses so I'm hoping someone here can help me out.

I'm trying out a new soil brand. The Roots Organics "Aurora" blend. I tested it with a ph meter today and it read 7.5+ and that was in the original bag. My plants have been vegging in them for about two weeks now and they're all showing signs of micro-nutrient lockout and the fringes of the leaves are curling upwards, looks like a little heat stress too.
I've raised my lights off a little but the soil pH is still relatively high and I think it's causing the issues with the leaves. It looks a little like pictures I've seen of zinc deficiencies and a little mag praying. They've been given straight water until last week, I them with Tamashi Bokashi tea brewed and mixed 1/2 strength with water, Since then their growth has been somewhat steady but each new leaf has a seriously crinkled look and some of the fan leaves are showing fringe curling and other strange leaf curls.

In the pictures you can see the new growth is thin, crinkled, curled, and just doesn't look very good at all.

I'd like to think the heat stress can be managed but I don't think it would help to get the soil pH down either.
I've read somethings about using dolomite lime to "buffer" the pH.

I recently fertilized with a blend of different organic products and that brought the ph down some but still pretty high. The plants look pretty full on macros but it's the micros they're showing deficient.
What should I do to bring the pH down? Someone mentioned to me that fertilizing will bring down the pH but I don't want to OVER fert & burn them.


I'm attaching some pictures, let me know what you think. And if you have any advice, it would be greatly appreciated.

[ronaldino]

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