Algae/Aragonite Question

[Barrett.Oliver]

During last nights water change, I took a layer of algae off the top of my aragonite sand bed.

My question is; even though there are still some signs of this algae on the sand bed. Am I still okay to put more aragonite on top of this? I was also wondering if this would be somewhat helpful in the getting rid of this algae by smothering the layer is sits on?

Thanks in advance for your input.

Barrett