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Hello! So this is my first time using sand, and after having it for about a week now I’ve noticed that there’s these little green spots scattered on the top of the sand, and I’m assuming its algae. I thought it would be easier to clean than gravel, but it seems like it’s almost sticking to the sand. So I can barely get any of it using my vacuum. I usually get more swishing my net through the water, but I was wondering how any of you deal with this and what I can do to clean it up and perhaps prevent it. Thanks in advance!