Why balling properly is so important

[Aqua-Digital]

He assumes two parts have no trace elements. They can and do. Whether they have more or less than the balling method depends on how it is made.

EXACTLY! Thats why you use Part C so you know what is being added you need and is balanced to what you need.

The "how its made" bit scares me the most with 2 part and comes back to the reason why TM is trusted, you know what you use in effect makes up natural sea water minus the salt. No concerns or guess work, this statement alone shoots two part slap center in the foot.