@jlts21 @Randy Holmes-Farley @W1ngz
As I have said many times before, I don't believe that any of the 2 Part methodologies account for all 70 of the trace elements found in natural sea water. Any of the ones that are left out, will be "depleted" over time due to the ionic imbalance created. This is something that Randy and I have always disagreed about. And it is no different now. One could certainly make the argument that once most of them are accounted for, like in a "better" two part formula, the remaining imbalances are so small as to not matter. I can't dispute or condone that argument, as the research on that has never been done. But the imbalance will exist for traces that are not included. I still think it is very misleading to say, as Randy does, "A perfectly designed two part has exactly the right elements (major, minor and trace) to exactly offset the salinity rise and necessary dilution.” If a trace is not included, it will be depleted in time. However, I do agree with his statement that “in actuality, the effect is much more important for Major and minor elements such as potassium or sulfate where this might be a major sink, compared to trace elements where this effect is likely much smaller than actual consumption.” No argument from me there!
The only way to avoid this imbalance totally, with additive supplementation of Ca and alkalinity as opposed to a calcium reactor, is either with the true Balling Method (not imitations like other products named Balling which are not Balling at all!) or an additive that does not form residual NaCl like Carbocalcium or calcium hydroxide.
The statement that W1ngz made is also very true when he said about my presentation “I get the sense that his percentages are somewhat exaggerated to make it more digestible for the audience with nice big round numbers. You won't jump from a 70-30 ratio to 80-20 in a week, and no one is pouring gallons of RODI into their tank to reset their salinity because of their 2-part dosing.” I have not been able to do the actual numbers on this. But the numbers I use in the lecture are to help make the point of this issue. It would be much less dramatic and understandable if I said that the ratio of 70-30 moves to 71-29. I just use the numbers as a teaching tool and concept.