Help Needed With New Sun Coral

[Gray Levison]

Hey everyone, a few days ago I bought my first sun coral but was wondering why it doesn't have the long tentacles seen in most pictures of the species...I'm able to get it to open fully to eat. I know for a fact that the LFS I bought it from wasn't feeding it for at least a few weeks before I got it so maybe it's just really malnourished? Are there any supplements recommended for this coral that would help it recover quickly or at least make the tentacles grow to normal length?

 

[rich nyc]

Not as hard as you think. I actually mounted mine with magnet just under my feeding spot so food just falls on it
I followed
https://www.reef2reef.com/threads/care-of-large-polyp-non-photosynthetic-corals.29838/