Jim,
You should be fine. If it is as white as mine was, I would hold off feeding it for a few days. With it under the MH lighting now, it should start to brown up very fast. Once it gets the zooxanthelle back in it's system you will be able to pull out the ruler and watch it grow and grow and grow and grow .............
Did your clowns take to it right away? It took about 3 months for my T/R to finally move in. I think the breeder used cyanide to catch them in the tank
I am now to the point of not feeding it anymore as it seems to grow everytime it is fed. Whatever the clowns drag in or it catches is all it eats.
Cheers,
Al