I can only speak from personal experience, however, I do not consider myself an expert in the hobby. The very first SW tank I had was a 125g FOWLR and it eventually erupted with green hair algae. In hindsight I know the reasons why it happened. I was over feeding my tank, I had a lack of CUC, and over lighting. I was and always have be diligent with my water changes, but still had an explosion of algae. I have to agree with the previous responders that trying to repair the situation by adding livestock that will eat the algae is just masking the problem. That said, some of my favorite fish are grazers which certainly help but I think it's important to figure out why the outbreak is occurring and to resolve it. With a great deal of patience and dedication, after months I was able to correct the problems. I figured out a proper lighting schedule, I rectified my feeding problems, I got a proper CUC and picked away with manual removal. That was a few years ago and I've never had another outbreak again.
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