Multipl coloured algaes id

Piece of reef

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Hey guys
Had my tank running for almost 6 months now

Parameters are
Ph 8.0
Ammonia & nitrite 0
Nitrate 10
Phos 0.13 ( working on it)
Salinity 1.024
Alk 8.5 dkh
Calcium 420
Mag 1275

All tests done with hanna and salifert

Anyways ive had light green algae show up a month or so ago and you can scrub it off the rocks
But also have this purple colour growin on the glass under the sandbed
And also brown which is diatoms


Any id on the purple stuff ? Is it cyano

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A worm with high fashion and practical utility: Have you ever kept feather dusters in your reef aquarium?

  • I currently have feather dusters in my tank.

    Votes: 67 37.6%
  • Not currently, but I have had feather dusters in my tank in the past.

    Votes: 59 33.1%
  • I have not had feather dusters, but I hope to in the future.

    Votes: 25 14.0%
  • I have no plans to have feather dusters in my tank.

    Votes: 27 15.2%
  • Other.

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