Monti plate regenerating ?

[sunoka]

I had a major disaster about 3 months ago my over flow box failed and broke lose so I had to drop the water in the DT and reattach the OF box. Well I let it sit for more than 30 hr. to cure but the silicone still poisoned my tank and lost all my sps Monti plates and all of my LPS but one the red brain coral.

So my question the dead Monti plate that I didn`t get broken off the live rock has color again.....I didn`t think it was possable now I regret removing all the dead plate because it is coming back.
I had a 8x8" plate and the other was 4x4" and it also is green now not dead brown.

How is this possable??