I'll be honest with you, to answer your rising ph level question correctly requires a full background on every variable & contribution to your system.
So it does make it harder when its not available, so at best we're speculating bud. Bacteria themselves use a range of compounds to achieve their perspective role, and as such in a close environment it has the potential to show rather quickly. Im suspecting even more will come to light as our understanding advances as a whole.
Unstable ph is like looking a car parked on a slope, if you dont have enough "Wheel block" to prevent the momentum, then it rolls based on the elements contributing to the momentum. The environment itself doesn't give a hoot about a slip, cause it will reflect any changes autonomously, even looking at something common like photosynthesis processes within the environment is enough to realise this fact. The danger focus (compounded by a close environment) is the animals we choose to keep within it. Every point drop or gain is by a factor X10, so 10, 100, 1000x's by each shift. I guess to us, its not the same, but thinking of it along the lines of pressure to get a grasp might help.
It you need more info or assistance, we all here to help, so yell out ok bud.