That mini bubbler is so cool. I almost went that route, but I was afraid of too much PH fluctuation in such a tiny space.
I think everyone is afraid of that, its some crazy growers fear. I grow in 1g DWC pots normally, and everyone told me that would be too much to manage as well.
MaxiBloom buffers out the pH, so thats that. Ive never owned a pH meter, only because the Maxi nutes have done so well (FloraNova did just as well for pH buffering too, I just opted for the cleaner stuff this time), Ive never been justified to drop the money on one.