There is a process to cook live rock that does not involve any heat. Now that I think of it I don't know why it is called cooking the live rock.
It is basically just putting the LR on a dark container with SW and a powerhead for movement, for about 8 weeks, think of it like curing the LR without lights. This is very popular with BB reefers since the LR will shead stuff when is first in the tank, you will do water changes and dunk the rock to help it sheed the stuff prior to adding it to the tank.
This will also kill all algie and supposebly aiptasia and mojano anemone because of the lack of light and food.
If you have a big problem with bubble algie or hair algie this is the way to go.