Sandbed Algae ID, doesn't get bubbles and doesn't fade at night.

Paullawr

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I think you have a couple of things going on there, not just one.

If worried its dinos grab a microscope and check. You can pick one up for under 20 dollars. Worthwhile purchase.

Its hard to tell from photo despite being clear. I would say there is cyano on sand, as for rest can't make it out.
 

Rock solid aquascape: Does the weight of the rocks in your aquascape matter?

  • The weight of the rocks is a key factor.

    Votes: 10 8.1%
  • The weight of the rocks is one of many factors.

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  • The weight of the rocks is a minor factor.

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  • The weight of the rocks is not a factor.

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  • Other.

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