your point was that different folks clean their tanks in different ways…at least one of which you find “questionable”.
Some of us are information driven. asking IF you can share your tank cleaning procedure is NOT missing your point. it was a request for more data. a polite & reasonable one too.
similar?
Medusa == stones that turn to chalk after forming appropriately
Chalking == Diamonds turning into chalk post separation
I would disagree. if you’ve got a list of hypotheticals, you can set up testable hypotheses. then you test them. one by one.
is it H2O2?
then someone NOT having an issue growing faceted stones simply needs to pour into two different containers as spike some with a little H2O2.
faster crash? Different morphology? do they chalk?
Neopentane? ethylene? Proplyene?
cool a jar and spike it, pour +/- added hydrocarbon suspect.
the only real caveat is that it requires a lab that (still) has their diamond game on point.
without the ability to produce decent sized, well faceted crystals, it’s non-trivial to add ingredients one by one to prove/rule out their involvement.