To be honest, this didn't convince at least me. I know about what is going using the 2/3 part salts chemically wise.
Regarding the "ionic balance" i find it MUCH more important to dose in a way matching tanks parameters correctly, than sticking to a 100 % "ironically based dosing recipe". This is a huge difference.
We know that our tanks consume Ca / Alk /Mg very often NOT in a balanced ratio.
Should I know continue a dosing that does not correct this parameters?? This is also ionic dis-balance.
My recommendation is clearly to correct in a way (even if it is dis-balanced dosing), in order to keep the parameters where they should be in our tanks.like natural seawater.
E.g. Not with Ca levels >> 500 just for the sake of Alk not dropping into a much to low range
Also your article does not describe why expensive premixed solutions should be better than if you DIY it. Cooking with water .....
Sorry for any criticism AND knowing that my opinion is somehow against what some people including companies selling expensive pre mixed solutions try to keep us thinking
Martin