Pocillopora coral dies in few hours any reason why?

Discussion in 'Reef Aquarium Discussion' started by Luke iskra, Sep 7, 2018.

  1. Luke iskra

    Luke iskra Well-Known Member

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    have Pocillopora coral in my tank got stung by my hammer alittle bit moved him over to the other side of the tank mostly same height and all from light started growing back for about a week today i look and all his polyps Are gone basically a whitish stick is he dead? If so what could of caused it

    Nitrates 10ish
    Nitrites 0
    Ammonia 0
    Ph 8
    Temp 75-78
    Calcium 480
    Alk 12
    Light marine orbit
    Salinity 1.025

    10 gallon tank

    B039FD71-92AD-45BE-AFB1-3A074231EC61.jpeg
     

  2. TessGlo

    TessGlo Active Member

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    It looks dead to me. How long did you have it before it was stung by the hammer? If its been with you for awhile and the only thing that changed is location (lighting) and the sting, it could be either of those factors, its hard to know. With a 10 gal tank, and especially if there are other SPS absorbing key elements, I would wary of swings in your parameters being a factor.

    Also, pocilapora polyps bail out when stressed and can form a new colony, so don't be too surprised if in awhile you find a tiny polyp taking hold somewhere else in your tank. Its a slim chance, but it does happen.

    This is not helpful to answer your question but sometimes you just loose corals. Sometimes for no reason you can pinpoint. I've had corals for close to a year, changed nothing, and wake up one day they are completely gone. It does not happen often, but it happens. I hope this is only a bump in the road and your tank will thrive.
     
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  3. Luke iskra

    Luke iskra Well-Known Member

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    Thank you for the advice buddy, I’ve had him for about 3 months for stung about 3 weeks ago i moved and do water changes weekly with reef crystals so my elements should be there i don’t dose tho is if possible he’ll grow back?
     
  4. mcarroll

    mcarroll PM me R2R Supporter R2R Excellence Award

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    IME they are tender frags and DO not like to be moved around. A difference in flow is all it seems to take in some cases.

    (They're tougher once well.established.)
     
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  5. Luke iskra

    Luke iskra Well-Known Member

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    So mostly likely he’s dead huh safe to remove?
     
  6. TessGlo

    TessGlo Active Member

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    Weekly water changes should help with stability. Sadly, it wont grow back from the skeleton.
     
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  7. Luke iskra

    Luke iskra Well-Known Member

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    You think my tank just isn’t suitable for one of these too weak light or not enough flow?

    USA marine orbit ( not the ic or the pro )
    240gph wave maker
    10 gallon tank
     
  8. Gareth elliott

    Gareth elliott Read, Tinker, Fail, Learn R2R Supporter R2R Excellence Award NJRC Member Build Thread Contributor

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    They are easier to kill with less light than too much light. I am not positive on the amount of par that fixture produces tbh. They will thrive around 250-350. Agree with @mcarroll about flow. Even larger colonies will start to die off deep inside if not enough flow going through them.
     
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  9. Luke iskra

    Luke iskra Well-Known Member

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    Think 250gph in a 10 gallon tank is too little?
     
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  10. Gareth elliott

    Gareth elliott Read, Tinker, Fail, Learn R2R Supporter R2R Excellence Award NJRC Member Build Thread Contributor

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    What pump are you using? Often when a pump says a gph it’s significantly less in reality. I would aim closer to at least 40x your total volume for sps. When your sand bed wont stay put you have too much, or need to re aim them.
     
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  11. TessGlo

    TessGlo Active Member

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    Plenty of flow, hard to say about the light w/o PAR measurement, however poci is not a super high light coral, so theoretically it could do well placed high up under even a weakish light. W/o a lot of SPS you should be able to keep your pentameters in place with weekly water changes but there will still be some fluctuation which could bother some corals.
     
  12. Luke iskra

    Luke iskra Well-Known Member

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  13. lzrlvr

    lzrlvr Active Member Catskill Reef Member

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    Is it possible the hammer coral did kill your pocillopora.
     
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  14. Luke iskra

    Luke iskra Well-Known Member

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    He’s across the whole tank from him
     
  15. mcarroll

    mcarroll PM me R2R Supporter R2R Excellence Award

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    Even just on a basic calculation of "GPH / gallon" your tank only has "25x flow".

    One of my tanks has more than 50x of always-on flow, and another 40x of variable flow.

    The other tank has about 100x of flow, half of which is running at any given time.

    IMO it seems likely that flow is too low.
     
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  16. Luke iskra

    Luke iskra Well-Known Member

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    Hmm good point I’ll put a another 240 hydro in flowing the other way should left i have a lot of dead zones behind my rocks
     
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  17. Brew12

    Brew12 Electrical Gru Staff Member Team R2R R2R Supporter R2R Excellence Award Reef Squad Leader Partner Member 2019 North Alabama Reef Club Reef Tank 365 Article Contributor Build Thread Contributor

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    If you have dead spots, you don't have enough flow.

    I know I'm in the minority, but I don't like setting flow based on pump ratings and tank volume.

    If you have wide flow pumps, you can put out an amazing amount of flow near the pump and very little in most of the tank. A pump with a narrow flow pattern may push a lot of water further into the tank, but can leave dead spots on the sides. Gyres put out way more total flow through a tank than their ratings suggest. Of course, non gyres can be set up and programmed to create gyres which also impacts total flow.

    The flow needs for every tank are different. You don't want to blast a coral directly with a narrow flow source. You don't want dead spots. Your aquascape will dictate the number and style of pumps that work best for your tank.
     
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  18. Luke iskra

    Luke iskra Well-Known Member

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    Yah Ima definitely setup a second one gotta fix my land scapes and the flow than focus on my light feel like my light isn’t producing enough juice
     
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