Yes, it was a divided 10 (now undivided), not a 2.5. Bettas in small tanks
is a pet peeve of mine; I like 5 gallons minimum for these beauties. She has
a castle to hide in (as I mentioned in the original post) and there are
several plants and other decorative structures, and she's much faster than
he is, so if he gets snippy she can easily escape and hide.

--
John Goulden