Natural ph Up/Down?

Hey everyone. Been sneaking around the forum for some time now and just decided to join. Been growing for some years now and for a while I've been doing the all organic thing.

My question is is there an all-natural/organic ph up/down that is easy to use? I see Earth Juice has a Natural ph up/down, but will this kill the microbes in my compost teas? Sometime my ph jumps up a lot.

i just asked this question in another thread. here is a link to the page of the discussion:

https://www.rollitup.org/organics/109517-blue-mountian-organics-12.html