Isn't BioBact a fertilizer? If so, it's a bad idea to use it to adjust ph.

You'll want an ingoing ph of between 6.3ish and 6.8ish for a peat based medium. (potting soil) Shoot for the higher end, as nutrients will usually bring the ph down further. I aim for 6.8 ph in my garden. Above or below the recommended range, and it will lock-out nutrients.

Any test method with a color-coded result (strips, aquarium test kits...) can not be used to test water with nutrients or runoff tinting, as the colors in the stuff will skew the color-coded results. They only work with clear water.

You spray the soil...? Why? If the soil needs watering, then for God's sake water 'em. A little spray on top is ineffective. (lower root zone needs hydration too)