Id let it ride. I have a mag and I must say, these are more robust than people give them credit for. Got mine from a reef show, foot was somewhat sticky, tentacles not sticky. Two weeks in a basket to heal and it was a bit stickier, went into the tank, and then balooned up and went into a WP40. Cut up a bit, I put it back in the basket, 3 weeks later back into the tank. It moved to a little cave where it pokes out as much as it wants, the clowns found it, and it has been awesome for 6 months now. Don't sweat the balling up, mine does it sometimes, others not. It doesn't seem to depend on flow/light/anything, it just does it now and then. The clowns love the thing.
I feed it a half a silverside once a week, I dont want it to get too big too quickly. I have a good amount of flow, but it actually LEFT the highest light/highest flow area of the tank in favor for less of both.
Its color is outrageous and it is now VERY sticky, eating like a pig. A bit too sticky actually... I am missing an anthias and a cleaner wrasse....
Mine is deep purple with neon green tips, under the blue LEDs it looks AMAZING. You are gonna love yours, just let it do its thing on its own, if it is bummed it will move, if it stays put, feed once a week and let it be happy.
Oh and dont listen to those who say if it inflates and deflates frequently it will DEFINITELY die. Mine did that for the first two months frequently and still does it rarely, but it is healthy as a horse. Probably had it for 7 months now, its color, fullness, and appetite have never been better.
good luck! If I can snap a pic in the next few days I'll post up.