I have tried opening the Anemone FAQ and get an error. Maybe it is just my computer?
It's a link that leads to a PDF file.
Fwiw -the natural hosts for a. percula are:
Stichodactyla gigantea and Heteractis magnifica
That stated -there is a sticky at the top of this thread where someone raised multiple true percs with multiple btas hosting them.
Also - I think it bears repeating that clownfish do NOT require an anemone. While in the wild they are inseparable, in our tanks it's not needed and forcing the issue doesn't help either the anemone or the clown.
I have a pair of true percs that have no problems laying eggs over and over again and have no issue with not having an anemone in the tank.