Dendro, how you get them to come back? I've been having problems with mine.
Light (> 3W/gal for 12" deep tank), food (mysis or smaller), and some flow. Takes months, though.
I show you, where mine was and how progressed.
For a some time after arrival - in the basic softies/LPS 10g tank:

The clown there was fed by grocery shrimp, salmon and mysis, the smallest pieces were given to the corals too.
Then for a short time - in the sun coral feeding chamber (~1g pico):
Every 3rd day bathed in the food (mysis, ocean Plankton), with 100% water changes after feeding, using old water from established tank. Was very low light, didn't liked the progress - this blasto likes the light. Moved back in 10g tank near window:
Here it's eating mysis:
You can see, how the dead polyp's skeleton becoming covered by a newly growing polyp.
Then - in best-lit 5-6g hexagon tank:
Well fed tank, because of filter feeders there and, later, the scooter blenny. The food was mostly mysis, a little Marine Cousine, dried Cyclop-eeze. Mysids shrimp swarmed in the places, unaccessible to the scooter. Sun-lit (southern window, Great Lakes region) plus 20-27W PC or CFL.
Will continue.