+1 on the guys:thumbsup:
Unfortunately matt is right on the possibly long recovery.
My tank gets a lot natural sunlight and one time i overdid it,as an experiment,they bleached too.
The ones that got lesser exposure,recovered about a month later.
One millepora that was hit the most,came back after 4 months.
Do what the guys suggested and their recovery will not take long.
Just my 02 cents