Diatoms?

Discussion in 'Nuisance Algae' started by mytank, 26 Aug 2011.

  1. mytank

    mytank

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    So the tank is going onto the 5.5 month mark, had a 30% water change about two weeks ago, has a bubble magnus skimmer in it lots of filtration and my parameters are:

    N02 - 0
    N03 - 0
    Phosphate - 0
    PH - 8.0
    Amonia - 0

    I had a similar "brown stuff" on the substrate before I did a water change two weeks ago, I did also add Brightwell Phosphate-E (remover) into the water after the water change and it helped bring the Phosphates down.

    The fish are all happy eating well (fed twice a day - Marine Mix with Mysis and mixed Flakes or Pure Mix with Mysis and mixed Flakes)

    So:

    x1 block of either Marine or Pure Mix
    1/2 or 1/3 block of Mysis (it's for the Tang mostly)
    Flakes (for everyone)

    Twice a day, morning and evening.

    Fish and coral seem to be as happy as anything Purple tang just doesnt stop eating off the rocks (but then again he is a baby)

    Every day a very fine type of green "powder" algae is growing on the glass... I clean it and it goes away go to work come back its there.... no hair just like powder....

    Seeing the pic's below I want to know:

    1. are these diatoms? If so then I know just to leave them do their cycle
    2. If not what is it
    3. How do I get rid of it
    4. Whats causing it


    Now the problem I have is almost over the course of three days it went from a nice and clean tank to:

    Tang munching away
    [​IMG]

    Also growing on the rocks...
    [​IMG]

    On the substrate
    [​IMG]

    More on the substrate
    [​IMG]
     
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  3. Keanan

    Keanan 2time

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    I'm not 100% sure but I think that is the beginning stages of cyano.
     
  4. maxisoft

    maxisoft

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    A bit of overstocking too fast will do this. I would say its mostly diatoms and another water change is required after bringing that muck up to the surface...... But I will leve this to the real experts to respond....
     
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  5. dallasg

    dallasg Moderator MASA Contributor

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    Exactly how i would have answered
     
  6. mytank

    mytank Thread Starter

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    The leave it to the expert part or it's Diatoms....?
     
  7. dallasg

    dallasg Moderator MASA Contributor

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    Its from excess nutrients, the biological filter needs to grow to accommodate the new fish etc. Stir the gravel and dont add more stock for a week or so
     
  8. mytank

    mytank Thread Starter

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    I will do so - you think Cyano or Diatoms?
     
  9. dallasg

    dallasg Moderator MASA Contributor

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    Your params are spot on :)
    Keep up the good work :peroni:

    Diatoms, but now that u have all in check, let things settle and adjust, also maybe feed once tomorrow and see how it looks sunday
     
  10. mytank

    mytank Thread Starter

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    To tell you the truth I am k@k scared the fish will starve hence the feeding:

    1. Is it to much (feeding amount in first post)
    2. So you saying only feed once tomorrow? And the day after i.e. Sunday?
    3. Are Algae flakes bad as well?
     
  11. dallasg

    dallasg Moderator MASA Contributor

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    The feeding is fine if most of the food is eaten before it settles
    Yes feed once tomorro eve, sunday judge buy the algae growth, we just going to give the bacteria a fighting chance to grow.
     
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  12. mytank

    mytank Thread Starter

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    Took the turkey baster and mixed up the substrate lots of shit and bubble released. So I am going to watch it over the next two days.

    Also if you don't mind want to do what max suggested:

    1. Sunday 30% water change (or should I leave it)
    2. Sunday is my Prodibia startup days
    3. Brightwell Phosphate-e?
     
  13. Keanan

    Keanan 2time

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    @dallasg forgive the dumb question but does bubbles also come from under diatoms like in the pics? I thought that it only happens with cyano?
     
    Last edited: 26 Aug 2011
  14. Tony

    Tony

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    it looks like cyano to me especially with the bubbles. If you try and dislodge it with a turkey baster it will come out in clumps, almost like a sheet. Diatoms dont do that. Incidently diatoms a form of algae and phytoplancton who form the skeletons from silicates to nutrients wont cause an outbreak in the absence of silicates. Phosphate removers generally remove silicates along with phosphates so I really dont think you have diatoms
     
    Last edited: 27 Aug 2011
  15. Tony

    Tony

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    This also tells me you're dealing with cyano
     
  16. Reef Maniac

    Reef Maniac MASA Contributor

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    Yes
    Correct
    Feed less, reduce bio-load, don't add any more bio-load, WAIT
    New tank, stocking too rapidly, over-feeding

    Think about it logically: Diatoms are algae, and algae are plants, and plants produce oxygen during the day (light) and carbon dioxide during the night (dark) - so YES, the bubbles could be produced by the diatoms. On the sand, it could also be nitrogen, being produced by your filtration bacteria.

    Hennie
     
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  17. Keanan

    Keanan 2time

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    Thanks Hennie. I had lots of diatom both times wen I started up my tank but never saw it like that.
     
  18. Bendor

    Bendor

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    Just found this thread on diatoms. This exactly what my tank looks like. Fine brown powder like substance with bubbles covering everything.

    Will follow the advice given (and get GFH).
     
  19. dallasg

    dallasg Moderator MASA Contributor

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    It's from nutrient overload :)
     
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