cycle dry rock?

[Boomboy]

just wondering if you left out rock that used to be live rock, and then put it in a tank that has live rock already cycled in it, does it go through a ammonia cycle or just become seeded from the other rock? pretty much just wondering if i will get a ammonia spike if dry live rock dry for 4 weeks, will cause a problem in my tank, or if i should just get a bucket and cycle it? anyone know from experince, thanks in advance.

[fishoholic]

Depends on how much dry rock you add compared to how much cycled LR you have. We added two 5 pound dry pieces to our 230g which has 200 pounds of cycled LR and didn't notice anything. Someone else I know added about 15-20 pounds of dry rock to their 40 pounds of LR they had and their tank went through an ammonia spike.

[Boomboy]

thanks alot, so it will go through an ammonia spike regardless, i will just cycle it out of my tank to be safe, spent so much money in the tank not worth it to chance it, and its not nice for the fish. any new fish laurie??