Starfish dying ?

Discussion in 'Quarantine Tanks, sick fish, QT corals' started by VicZA, 3 Sep 2014.

  1. VicZA

    VicZA

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    My starfish has not seemed well over the past week or so and today started to show (what I think is) some signs of really struggling.

    It has not moved much in the last week - it would normally cross the length of the tank in about 1 hour

    Coloration is still normal and I can see the little feet sticking out the star ends but they not moving very much

    Parameters are as per usual but I am currently battling with something that has spiked and caused a rather large cyano outbreak

    Here is a pic:

    Starfish 01.jpg
     
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  3. Gesiggie

    Gesiggie Challenge accepted

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    Can you see any visible tissue damage?
     
  4. RiaanP

    RiaanP Moderator

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    When did you get it?
     
  5. rigby

    rigby

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    What does a starfish actually eat??
     
  6. Gesiggie

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    Depends on type of starfish.
    There are some predatory ones (not common in our systems), some are algae eaters, and some are scavengers (like the macro brittle star and sand sifter)

    The one in question I think is an omnivore, eating microorganisms, and revert to scavenging at times
     
  7. dallasg

    dallasg Moderator MASA Contributor

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    when you say as per usual, what are they? the reason i say this is that 1 of 2 things will cause livestock to die, params that are off, pH, NH4, NH2 and with inverts S.G & NO3, and ALK & PO4 with corals and then starvation...

    so my experience with starfish, a few things are key, salinity and ph swings, starvation and predators...

    what has changed? what has been added? how is RO added? how long have you had him?
     
  8. VicZA

    VicZA Thread Starter

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    OK, let me try answer all of these :

    1 - Got him around May this year
    2 - RO water is added as needed manually and has 0 TDS (checked very recently)
    3 - Parameters are:
    3.1. pH = 8.2 (stable for more than 6 months, no swings, tested every 2nd week)
    3.2. Salinity = 31ppm (dropped from 35ppm) this has swung a little +- 4-5 ppm recently
    3.3. Phosphates = 0.02ppm - last read on 19 June 2014
    3.4. Nitrate, Nitrite, Ammonia = 0.00ppm - last read 19 August 2014
    3.5. Temperature = 25decC (constant, no dips)
    3.6. Calcium = 370ppm (26 Aug 2014)
    3.7. Magnesium = 1600ppm (26 Aug 2014)
    3.8. Alkalinity = 7.8 dKH (26 Aug 2014)
    4 - No visible marks on it at all
    5 - Starvation ? Not sure since the back pane has lots of algae to eat and is where most of my snails, blennies and Yellow Tang nip from

    The only thing I am concerned with is this cyano as it covers everything - have started to dose vinegar but no visible signs of improvement yet.

    I also have 2 x Fire Shrimp, 1 x Pistol Shrimp, 1 x Urchin, all are 100% happy.

    On a separate note I have attempted 3 times to have peppermint shrimp but theyy all die (10 in total now) - the 2 fire shrimp were my very first inhabitants in December last year, have molted dozens of times and are still going strong
     
  9. Fraser W

    Fraser W Swazi Reefer

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    from my understanding a shrimp is a very sensitive creature, and to have lost 10 without one surviving leads my to say something is not right in the system. but I couldn't point you in the correct direction
     
  10. JackSplat

    JackSplat

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    Large salinity swings like that could cause quite a lot of trouble
     
  11. VicZA

    VicZA Thread Starter

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    whatever caused it, the starfish is now dead :m20::m80:. No visible movement, very thin and sinking into the sand. Also can see what looks like decay .... think I need to get it out of the tank. I tried picking it up and it is very limp and soft. I remember it would normally stiffen up if "bumped" - so is that a sign it is gone ? @dallasg
     
    Last edited by a moderator: 26 Nov 2015
  12. riaanwium

    riaanwium

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    Sorry for your loss man, I had the same issue with little red starfish. Had 3 of them.
    Got a brittle star now for 6 months, no problems.
    Try to increase your Alk to at least 9dkh and increase your Calcium to to at least 400 to 420.
    My shrimps didn't last long after the starfish died due to low parameters.
    Cheers
     
  13. VicZA

    VicZA Thread Starter

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    Thanks mate ! Is 9dKH not seriously TOO high ?
     
  14. riaanwium

    riaanwium

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    Not really, you can go as high as 12 but that is on the limit. i keep mine at 9 at the moment.

    between 8 and 12 you should be fine
     
  15. dallasg

    dallasg Moderator MASA Contributor

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    with alk, the only value needed is a constant one :)

    choose 8-9 and keep it as stable as possible, your corals will love you for it and reward you with many frags
     
  16. VicZA

    VicZA Thread Starter

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    In order to keep it stable is it ok to use Bicarbonate of Soda as a dosing agent ?
     
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