A couple my thoughts here; at first glance 598% consumption does sound pretty astronomical. So much so that I absolutely checked everywhere for visual/meaningful signs of precipitate and I can tell you with 100% certainty...it is not present.
I'd be pretty confident in saying that we can't reasonably expect a direct 1:1 ratio for amount dosed to the tank versus calcium carbonate skeletal structure built, so I think hoping to see a 598% visual growth increase is a bit too large of an expectation. Along with that, there are probably a variety of other factors tied to the consumption of 60mLs per day that make it really tough to attribute directly to just coral growth alone and this early in the test, our eyes might not be the best measurement tool.
That said, I'm just as surprised at the differences in consumption and verified the data with Aaron. It's really going to be interesting if the same data holds as we continue the experiment over the next 8-months or more!
I don't know if Randy Holmes-Farley is reading this thread, but I do recall him mentioning before that it takes more alkalinity dosing to maintain higher dkh levels in the tank. I'm not smart enough to know why! lol