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I just re-read my question about the small diameter vertical tube and realized that it was missing a few words. It should have read:
Is the small diameter vertical tube in the "downflow" side of the chamber provided to allow any CO2 that collects at the bottom of "downflow" side under the foam block and perforated plate to rise to the top of the reactor?
But you understood the intent of my question even without the missing words at the end of the question.
Overall, the design looks pretty good. And who says that a reactor has to have a circular cross-section? I imagine that the materials for a cylindrical chamber would cost more. And using a rectangular cross-section gives you more water volume in a similarly sized footprint - assuming the support base of the reactor is rectangular.
Gary
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