yah that's how i did mine too. 200 pounds of marco rock and 66 pounds of live-rock.
There was an insane outbreak of algae - started on the live-rock, then spread pretty rapidly to the marco rock. It was like watching a forest successional sequence at cheetah speed. The marco rocks got dominated by one species, then as the number of species on the rocks increased and coraline algaes moved in, it went from "AAAAAH OUTBREAK!!!" to something that looked more normal. That took about three months.
If you've got good nutrient management systems in place, this will pass. If it doesn't pass, you can start looking at why and then decide what to do about it. Human muscle power is probably the least efficient and most frustrating way to deal with algae. Your tank is going to go through a lot of changes in it's first year. My tank turned 1 a couple of weeks ago, and you wouldn't even know it was the same box of water from when it cycled.
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