Not sure if this information would help, but we used a product called Shiva by Crop Nutrients. It is a 2 part formula that you use from start to finish. it is extremely PURE and uses no ammonia based materials in the formula.
This formula also contains chlorine. On the label it says not more than 2% chlorine.
Both parts A&B are as clear as water. We ran EC/PPM levels as low as 400PPM (.5 x500).
It seems if someone wanted to run sterile these would be the nutrients of choice. They are complete and need no Cal/Mag additive even in 0PPM RO filtered water. Since there is NO ammoniacal Nitrogen or ammonia based calcium in the formula as they use only pharmacy grade materials, there is no need for the nitrifying bacteria that converts ammoniacal nitrogen to nitrate nitrogen.
We noticed that on average most formulas supply at least 25% of the total amount of nitrogen from ammoniacal nitrogen which requires bacteria to be present to break it down or convert it into something the plants can use.
Depending on the system conditions, an outbreak of bacteria can be generated by exceeding amounts of ammonia. It is also non productive to try and run a sterile system using ammonia based materials in the formula since bacteria is needed.
The amounts and concentrations levels in Shiva were higher than any other brand we tried except for maybe
Dyna-Gro Bloom formula.
We also found the online calculators for Crop Nutrients were extremely helpful. You can use it to dial all aspects of your growing environment even down to C02 amounts!
What I thought was really cool is that with the nutrient calculator you can enter what your starting water EC/PPM levels are.
From experience in using the UC systems we found that avoiding ammonia based materials seem to be more stable and over all performed better. It seems especially helpful in avoiding pathogens and running a "sterile" system op.
And no I do not work for Crop Nutrients! LOL! We just tried a bunch of different nutrients in the UC system and Shiva was one of the products we tried and it seem to work the best and be complete meaning no additives or PK boosters are even needed, not even Cal/Mag which was a huge part of our nutrient cost that we do not have to purchase.
It was also one of the ONLY formulas we found that contained no ammonia based materials in it at all.