nice tank m'man
Its okay to keep a fish like that in a smaller tank for a while I beleeve,no biggie.But you MUST do your waterchanges regularly!!! its alot of bioload! I knew a guy who had 3 damsels in a 3g and they where fine.But just keep it in mind that you will need to move them when the time comes.
I heard somwhere that BTA's dont need any light,I think I heard that on TGVAS but I cant remember.I could be thinking of the wrong anem.
man thats a nice worm,where did you get it?It musta cost a fortune!SW stuff is expencive in victoria haha