Seiryu stone and crazy KH
I recently decided to retest my KH (I should be doing this more often, I know!) and, good lord, I put 18 drops into the tube using an API test kit and decided it didnt matter what it was, because i need to figure out how to lower it. Previously, I had been using small amounts of Neutral Regulator powder with the new water to keep the PH at 7.0 (since my tap PH runs around 7.8), but stopped since I added pressurized co2 to the tank (reading that it lowers PH).
I added the seiryu stones around the time I added pressurized co2. Its one large stone and a few smaller ones. Tank is a 15g.
I also have indian almond leaves and driftwood, not sure if that counts for anything.
Do you think the seiryu stones, in addition to how soft i had been making my water, caused my KH to skyrocket? I know months ago on DIY co2 the KH was 2-3 drops.
So in short:
15g tank | pressurized co2 | eheim filter
co2 is 1BPS, co2 checker is usually light green.
Seiryu stones | driftwood | indian almond leaves
Should I be especially worried about this?