I’ve not seen anyone report a dose that is too strong from an ammonia tox perspective, but some folks do see rising nitrate.
If the nitrate is rising, the dose may be too potent, but I’m sure these are doses that are much higher than 0.1 ppm.
The same effect happens when reefers try to dose too much organic carbon… too quickly…in a system that is young, never seen it, etc. Initially nitrate will elevate instead of fall.
I think the 0.1 is a good place to start.