Yeah I hear ya.
Hey not sure if you're using liquid silicon or not but ,like was posted elsewhere, it does seem to raise the ph of tap water. (at least that's what I witnessed when I tried it) went from 7.0 to 8.0
EDIT: ok duh, guess i didn't read the thread again. sorry for the repeats
I use
Dyna gro Pro-tekt in all my applications (foliar and soil drench) and it really does make a difference.
But then I added 1 oz of fish hydrolysate (in 1 gal.) and the ph went to 5.0
Liquid kelp and fulvic acid didn't budge the ph at all.
Silicablast can indeed be used to raise pH, tap water, especially mine, is easy to shift upwards due to alkalinity (general and carbonate hardness) and in the situations where I use straight well water I just don't bother changing pH. Silica is a great pH up for RO/DI water, as is the Humax, but silica doesn't offer the other benefits of Humax. Also, I use rice hulls in my coco mix, and they provide potassium silicate (which means that I have to formulate feeds with almost no K, as coco already has a high available level).
The liquid organics, hydrolysates, guano teas (pre-bottled), etcetera, ALL drop pH drastically, down into the 4's when mixing into RO/DI water.
Now, organic soil, outdoors, those girls get the drippers during the week and that water is 100% unfiltered in any way, and normally receive weekly feedings through nutrient teas. Except last year, when our granddaughter was living with us, my girls didn't get a damn thing. Couple of applications of urine, two or three feedings of carbs, and two or three Bt sprays (that cost me on the Mendo Purps cross). Otherwise, not a bit of care outside building a frame to staple Hortonova to. In this growing situation, there is no need at all to muck around adjusting pH of feed or water, no need at all.