Detailed form submitted: zayd

Discussion in 'General Discussions and Advice' started by zayd, 24 Aug 2011.

  1. zayd

    zayd

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    Detailed help request
    Are you experiencing any problems in your tank?
    Yes
    Brief Description
    Bleaching of purple millipora
    Tank size
    1500 x 1000 x 750
    System Volume
    Abount 1500 litres
    How long has your tank been running?
    1 year in new system
    What livestock do you have?
    Purple tang, yellow tang, regal tang sailfin tang, red firefish, diamond back goby, chysurus angel, yellow tail damsel, common clown, blue/green chromis.

    Several SPS, LPS and some softies.
    Water Parameters
    Alkalinity - 7.5
    Calcium - 450
    Magnesium - 1300
    pH - 7.65 to 7.85
    Salinity - 1.0025
    Temp - 25 to 26 deg celcius
    What lighting is over the tank?
    8 x 54w T5 Powermodule
    Pumps and equipment
    2 x Tunze steams - 22000 litres
    1 x AM Prop - 15000 litres
    Phuture lab Skimmer rated for bigger tank that works very well.
    In-sump cryptic DSB.
    calcium reactor
    kalkwasser stirrer
    sulphur reactor
    carbon and phosphate reactors
    Maintenance
    Weekly water changes with synthetic salt - Seachem.

    Lamps are about 10 months old. Started changing them last week - 2 per week.
    Other info and photo's.
    [​IMG]

    Over the last couple of months my purple milli has become lighter and lighter in colour. Please see pic below. This is the only SPS that appears to affected.

    I am now worried. Is it that my lamps need changing or perhaps the pH is too low?

    This morning I added some Seachem buffer to up the pH and will try to get it above 8.0.
     
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  3. archiecrain

    archiecrain

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    What is your nitrate @?

    It doesnt really look bleached badly, but cant really see from the picture.
     
    Last edited: 24 Aug 2011
  4. zayd

    zayd Thread Starter

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    Haven't tested nitrate and phosphate for a while.
     
  5. archiecrain

    archiecrain

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    Is the tissue dying? or are you refering to the coral simply getting lighter in colour?

    If you know what your nitrate levels are at, it could help give a clue as to the cause of the lightening in colour.
     
  6. zayd

    zayd Thread Starter

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    The tissue is not dying. The polyps are extending nicely still but the colour is lighter and in patches almost white with a tinge of purple.
     
  7. Tony

    Tony

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    Do you dose potassium or iodine?
    Is there any recession from the tips or base of the coral?
    Do you feed the coral with plancton etc?
    Have you had a sudden drop in nitrates or phosphates?
     
  8. charlv

    charlv

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    Do you dose amino?
    Any alk swings?
     
  9. zayd

    zayd Thread Starter

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    I only dose Aquavitro fuel, before that Seachem Reef Plus - basically the same. I stopped dosing iodine about a couple of months back and also stopped feeding plancton. But all my other corals appear fine.

    I must test the nitrates and phosphates tonight.
     
  10. zayd

    zayd Thread Starter

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    I dose Aquavitro Fuel.

    Alk is currently stable, but was an issue a few months back due to calcium reactor. Been stable for about 2 months.
     
  11. archiecrain

    archiecrain

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    If its not tissue recession then it may have something to do with low nutrients....

    Been there done that I often push nutrients too low and I almost immediatly see my Digi's go super pale.....But I say this without knowing what your Nitrate levels are....
     
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  12. zayd

    zayd Thread Starter

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    Could be. I will test tonight and also get some coral food which I have not been dosing for the last couple of months.

    Thanks for the help guys.
     
  13. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Zayd, how long have you had the coral for?
     
  14. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Sorry was speed reading, I see you have the coral for a few months now.
     
  15. Sammy

    Sammy

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    Sorry for the obvious question here, but isn't your SG and pH a bit low, I didn't think corals do well in that low SG ??
     
  16. Keanan

    Keanan 2time

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    I'm sure that was a typo.
     
    Last edited: 24 Aug 2011
  17. Sammy

    Sammy

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    Yes, my bad !
     
  18. dallasg

    dallasg Moderator MASA Contributor

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    i would think its low potassium, @Manic can confirm
    also i think your ph is too low
     
    Last edited by a moderator: 26 Nov 2015
  19. zayd

    zayd Thread Starter

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    Actually have it for 4 yrs - 10 months in new setup.
     
  20. zayd

    zayd Thread Starter

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    You right. Apologies.

    May be pH, but I believe tanks withs calcium reactors go as low as 7.7. But I am increasing it by buffering. Will also increase my kalkwasser.
     
  21. zayd

    zayd Thread Starter

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    Thanks.

    How does one increase potassium? Not one of the parameters normally referred to in this hobby.
     
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