Catching up on this thread, a lot to read.
I don't have much to offer to the discussion, but I have one question. Maybe this has already been discussed in this thread...
But, is this Bolus Dosing method by Fauna Marin designed to replicate the natural pH fluctuations of shallow ocean? See
Cornwall et al. (2013). Diurnal fluctuations in seawater pH influence the response of a calcifying macroalga to ocean acidification.
"In the open ocean, pH does not vary greatly in time and space. . . By contrast, near-shore marine organisms live in a highly variable pH environment where daily pH fluctuations owing to biological activity can exceed 1 unit. These changes are often driven by primary producers increasing pH in the surrounding seawater during the day via photosynthesis, and decreasing pH at night owing to respiration."
I understand the flaws in the chemistry that have been discussed by Randy and others, but perhaps they are aiming for this type of pH swing. Not sure if it's beneficial or not, but interesting to read.