As my tank starts to settle in I have gone through a number of algae blooms... brown diatoms, green stringy stuff.... some greenish brown leafy stuff..... I know... I will get some pics but here is my question. The blooms have created a crust on the top of my sand bed, should I remove it... let it stay there... or what? Does this prevent the dsb from doing it's job? Mainly I don't like the way it takes away from the bright white sand bed and it's reflective properties.