Now, I'm not exactly new, however, this diatom bloom is. In my other tank I never had this issue, perhaps it was my rock and sand choice? Anywho, About a week ago I noticed some brown gold algae on my rocks, one day later, almost the entire tank (rocks, sand, glass) were all covered in it. But now, it's almost completely gone... Any ideas? Maybe my silicates just went away? not sure.