curing rock yourself

What I did was put the liverock in the container that was to hold it during curing. Then I put the saltwater in and placed a heater in with it set to 79 degrees. I also put a powerhead in the container to keep the water circulating. If the rock is not cured at all, there will be a lot of die-off and you should do 100% water changes twice a week and scrub the rock to get the dead junk off. This of course is only for rock you are going to put in an established aquarium. If it's a new tank, then just put the rock in the tank and let it cycle. It's just gonna take a long time to get through an entire cycle.

You must have it at the properly salinity and temperature for curing. Otherwise you're just killing all the life on it.

If you are adding it to an established tank, you need to let die-off happen otherwise you could have another big cycle and spike in ammonia. If it's a new tank, you don't need to worry about any of that because you want that cycle to happen.