How long should I boil live rock for?

[Myka]

I would not have done that if I were you. Chances are you killed off a good portion of the aerobic and anaerobic bacteria on the live rock. This will cause the rock to leech a lot of ammonia and phosphate.

Now that it is done, I wouldn't put that rock into any tank for a long time. I would put it in a tub and "cook" it (does not involve the stove!) for several weeks so it can leech those nasties somewhere safe before introducing it back into a tank where it can then be seeded.

[ALang]

+^^!!
Unless you are able to do it in your tank, with no lives stocks, none.

You need to closely monitor your tank's parameters the next few weeks, even couple of months. I wouldn't put any of your good live rocks in there with the boiled ones yet, until most of the nitrates, etc, have been leached out and testings shows that they are near or close to finishing the cycle.

Good luck.