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You're going to have hair algae. There's no point in trying to avoid it, you'd need a sterile tank. What you want is to not have /rampant/ hair algae; having it present, but invisible, is harmless. For that, you want nutrients at a good level (including not too low), a light set up for corals, a good cleanup crew, and, preferably, plenty of biodiversity. Ocean live rock would be helpful on that last front, and on the maturity front in general.
Starting with all dry rock, you WILL have an ugly stage, that may include hair algae. Don't stress about it. Keep your nutrients reasonable via whatever amount of water changes will do that, stock a cleanup crew, and let it burn itself out. Slower-growing, non-pest algae will win out.
Once the tank is stable, a tuxedo urchin will eat lots of hair algae, but you have to be sure there's enough food for it.
Starting with all dry rock, you WILL have an ugly stage, that may include hair algae. Don't stress about it. Keep your nutrients reasonable via whatever amount of water changes will do that, stock a cleanup crew, and let it burn itself out. Slower-growing, non-pest algae will win out.
Once the tank is stable, a tuxedo urchin will eat lots of hair algae, but you have to be sure there's enough food for it.