Not to be argumentative, heaven knows thats not like me, but if you don't feed it thats the demarcation of a potentially long...slow decline. As for the tenticles I can only speak for my BTA. My experience has been that the longer between feedings the more the tenticles deflate. (Stringy) When fed the proper amount of food they do return to their bubble state even though there is a female clown actively hosting in it. They may not look like the nifty promo pics on vendors websites but you can see a difference. Coloration is a lot brighter in my experience with fed vs starving. My green BTA was practically brown though it sat in the same spot for nearly 6 months under MH
lighting (With no feeding). I began doing research and silver sides seemed to be the predominately preferred food. After only 2 months of feeding, the BTA has at least doubled in size and is now a beautiful flourescent green again.
Please take a look at http://www.karensroseanemones.com/index.htm
While the site may put you off a little at first it does offer some seemingly extensive experience with BTAs specifically. Whatever you decide monitor the BTA as you would any other animal in your care and adjust accordingly. The only additional advice I can offer is that time and time again reading about others experience with BTAs is that they decline in a hurry once they succumb to their condition(s). Hence I would encourage you to error on the side of too much than too little. If a BTA does not want to eat it will simply drop the food from its tenticles. In that case they are either content or potentially doomed. Isn't this hobby grand?