My guess is it will kill your "greens" although some my survive, and some may grow back.
At this point they are all competing for the same things, and you've got it all in abundance (as it should be when cycling). As Brian said, anything in the tank is not likely to survive. The cyano, and other micro algae will probably starve out the "greens".
Most don't do any water changes until the ammonia rises and falls, followed by the nitrites rising and falling, and then the nitrates rise, and water changes, reduce the nitrates.
Here is a good thread to read, to fill you in on the cycling process.
http://www.reefsanctuary.com/forums...something-cycling-breaking-new-reef-tank.html