I have run an algae scrubber for many years on my 200G system, and before on a 50G system.
DIY waterfall type.
Done right, there is less spray and humidity than a skimmer because it can be fairly well sealed.
Done right, and it can really reduce nitrates and to some extent phosphates.
Done wrong, and it can create and endless mess for your tank. Starving corals, turning water yellow, etc.
So my advice:
1) If you plan to have a lot of fish, seriously consider it, but do your research carefully.
2) This is one piece of equipment you do NOT want to oversize.