I'm glad that this thread was started and will hopefully it will continue to help others that are able to fight their tanks with bryopsis. It's worked well in most cases.
However, I've been keeping myself, for the most part, from things that distract from the purpose of this thread and the ongoing experiment.
China....
It's been pointed out that this specific variety of fluconazole is not from China.
The red letters on the packaging are those of the manufacturer, TO (T.O. Group Pharmaceutical) who does have certification from the National Food and Drug Organization. They are also a major drug manufacturer throughout Asia. They are headquartered in Thailand and have been around since 1979.
http://www.togroupthailand.com/index.php/en/
Also as NCReef mentioned, payless petmeds are bases in California. Payless Pet Meds have been a registered business on Amazon since 2008.
https://www.marketplacepulse.com/amazon/usa/payless-pet-products
I know there are some who don't do any research whatsoever about what they are using for their tanks and only care about rather or not something works but I've done an extensive amount even before beginning this treatment.
At this point I think it's careless to continue to group symbols and products made in Asia as being made in China for cheap or illegally. I would assume that if there was an uncertainty about Payless-pet-products, Amazon would not allow them to continue doing business with them.
I'm hoping that this thread will continue to move forward the way it started. This is still an experiment that we are all learning from that still needs research.