Anyone using Silica (Potassium Silicate) as pH up?

I do, I use Armor Si as a PH Up, but I have noticed some incompatibility when mixing (and i always add it before anything else to my tap). Im looking for substitutes as Ive also read that potassium silicate is a low solubility source of silica.

these are two nice thread to check for silica as PH up

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