Strange cycle in tank?

[EddieKay]

I just filled a 75gal. reef tank with 100lbs. of partial cured rock 2 days ago. I scrubed off all slimey and decaying pieces then placed it in the tank.(new tank, no life forms). Before I placed the rock I tested the water. Nitrites and nitrates were zero as expected. Today, 2 days after rock was put in I tested again, Ammonia was 0.25 mg/l, nitrites were 4mg/l, and nitrates were 100mg/l(all salifert tests). Is this normal cycling, why is ammonia so low and the nitrates so high already(i understand the nitrite part). Also should I do a water change today, If so how much

 

[Tackett]

...looks normal to me... do your water changes, wait a few months, and you should be good to go.

 

[ChrisRD]

If you give some more details about the setup... ...for example what you are using for circulation, skimmer, etc. we can probably provide more insight.