Ask Sewingalot about mistaking Fenbendazole for Flubendazole.
and there are a few others that have confused ratios when making conversions among other things when reading web advice. Less fillers and inerts in a compound I'm adding to one of my tanks is something I consider a good thing.
I'll say it again and again,
Know what you are dumping in your tank.
Know you tanks actual water volume when dosing via solution.