Yeah, I'm in hydroton- I should have just run the system with no plants for a couple days first- the pH appeared to completely stabilize over the past 24 hours. When I got up this morning, it was right where I'd left it.

I just picked up a set of Canna Aqua A+B anyway; it's buffered in the right range... a little more security there.

Anyway day 7 of the experiment and I can report:

-The plants are still alive.
-pH is stable (knock on wood).
-It has only overflowed twice, and hasn't fallen through the living room ceiling yet...

May I say it's an unqualified success? HAHAHA sometimes it's nice to have low expectations... :jointsmile: