0.03 phos and 10 nitrate are good nutrient levels. Your phosphate is actually about bare minimum, it's not a problem.
You're just in the ugly stage. It's not going to go away until your tank matures, and gets enough non-pest algae growing to compete with the pest algae. Pest algae (and cyano, which I lump with pest algae for the purposes of this explanation) thrives on empty space, and slower-growing non-pest algae needs time to replace it.
So, yes. Cleanup crew, manual removal. IMO, don't worry too much about the bulk of it, though. Just keep it off your corals. It'll go away on its own eventually as the tank balances out, without too much scrubbing. Any algae not on your corals is primarily an aesthetic issue, unless it's driving your nutrients down. Do NOT let your nutrients get low. Aside from the fact that it'll hurt your corals, it stunts the growth of the non-pest algae, while not harming the pest algae much. To get through the uglies, keep nutrients at least where they are now, and ride it out.
You're just in the ugly stage. It's not going to go away until your tank matures, and gets enough non-pest algae growing to compete with the pest algae. Pest algae (and cyano, which I lump with pest algae for the purposes of this explanation) thrives on empty space, and slower-growing non-pest algae needs time to replace it.
So, yes. Cleanup crew, manual removal. IMO, don't worry too much about the bulk of it, though. Just keep it off your corals. It'll go away on its own eventually as the tank balances out, without too much scrubbing. Any algae not on your corals is primarily an aesthetic issue, unless it's driving your nutrients down. Do NOT let your nutrients get low. Aside from the fact that it'll hurt your corals, it stunts the growth of the non-pest algae, while not harming the pest algae much. To get through the uglies, keep nutrients at least where they are now, and ride it out.