Vacuuming vs live crushed coral

[jassz]

Hi all. Each day I discover more and more rocks that are starting to turn in to stunning live rocks. I love it! But this week I noticed that some of the crushed coral (which covers the bottom instead of gravel) is starting to turn green and red too. I hadn't counted on that, but I'm happy, I guess. LOL My only concern is I have been vaccuming this crushed coral each week with the water changes, but I'm not sure I should continue. Do I even have a choice? I mean, I have to vaccum, right, even if I have to sacrifice the algae?