P.H Questions, Like how does nutrients affect P.H

So my filtered tap water is PH'D at 6.5-7

And when i add 1.5 ML of general hydroponics micro flora it goes to 7

So I've been testing the run off and the past couple of waters runoff been 5.5 - 6

So im wondering does nutrients make the soil acidic over time? and what can i do to raise this ph

A LITTLE BIT MORE INFO if you need it

Im growing a Autoflower from Advanced Seeds, it is blue diesel

And probably has something to do with it, and i know im gonna get shit for this, but im growing in miracle gro moisture control, my plant is healthy and big so the soil works for me i know there is some ffof fanboys that swear by that stuff but its buying dirt and id rather pay 4 bucks for dirt vs 20 cause im a cheapass

Im usings 4 23 watt cfl's 2700 k n 6500k

I just want to know how to get the ph runoff in the right range, or does that even matter?

The 1.5ml is for a liter btw

Pics? and idk anything about soil but if you want to raise your runoff ph just raise the ph of the watering solution. Buy some ph up and add it to the solution and raise the ph higher and in turn the runoff will be higher.

I, and many others, never bother with checking ph in soil. It's pretty much set when it's mixed up.
I'm not even sure where my ph metre is

Never ph the nutrients to water that you ph first,ph after you have added the nutes with ph up of dowm, and still different,every where you live,where I live in the uk canna send mine to 5.6/5.7 ,but that was years ago ain't ph'ed since I still use the same nutes .and I checked it This morning for the first time in years 5.6,try advanced ph perfect if growing hydro ,I did sensi pro that was great too but now I use a mix of bot advanced and canna

It depends on the contents of your nutrients. For example, some nutrient lines use Nitric Acid as their primary source of nitrogen or Phosphoric Acid as primary source of phosphorus, which all lower the pH dramatically. But others use nitrate or phosphate salts instead. These salts, when soluble in water, tend to slightly decrease the pH, but after you feed the plants with them, they can increase the pH of your medium over time. It's complicated.

Hessam said:

It depends on the contents of your nutrients. For example, some nutrient lines use Nitric Acid as their primary source of nitrogen or Phosphoric Acid as primary source of phosphorus, which all lower the pH dramatically. But others use nitrate or phosphate salts instead. These salts, when soluble in water, tend to slightly decrease the pH, but after you feed the plants with them, they can increase the pH of your medium over time. It's complicated.

Click to expand...

Testing the run of in in soil will give you a idea of what's been utilised

I use tap water. If I want to just water I have to use a small amount of ph Down.
If I feed veg I have to use a small amount of ph Up.
If I feed flower I have to use twice as much ph Up.

I mix my soil to come in around ph 6.7
after harvest the soil usually comes in around ph 5.9

It's almost like science is involved somehow.
I'm with Hessam ... kinda complicated.