So I'm nearly positive now my high core 7 dose is due to running higher PH > 8.20. My CO2 media just became exhausted which dropped my PH about 15 points overall to about 8.0-8.2 (instead of 8.15-8.35) and my alk is spiking at current dosing levels set for high PH. Can anyone else confirm they've seen similar results with high PH?