From my limited experience adding a large amount of cured live rock can quickly cycle a tank. I think its best to add the majority of your live rock or as much as you can afford at the start so that in a month when you want to add more live rock you dont get another cycle. Sure its expensive stuff but good quality live rock houses all that benificial bacteria that keeps our tanks going and was one of the best investments in my tank.
Im not sure if the twenty some pounds you put in would cycle the tank that quickly, especially since you recently just added fish. Either way cycle or not the process has started and I would not add anything else for at least another month besides maybe a small clean up crew. Keep testing you water and reading as much as possible.
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