SPS Tips receding/bleaching ?

Discussion in 'SPS Corals' started by Apollo, 10 Nov 2015.

  1. Apollo

    Apollo

    Joined:
    25 Sep 2008
    Posts:
    1,076
    Likes Received:
    67
    Location:
    Fourways
    I've had various small SPS frags in my Nano since Feb this year.
    Over the past 3 weeks I have noticed one particular Acro frag which looks as though the tips are receding/bleaching ( See pic on left hand side ). Sorry, the photos are poor. Taken from my cellphone. The particular frag still shows healthy polyp extension further down and is even starting to colour up a bit at the base. The frag is high up in the tank, approx 15cm below the LED light.

    Parameters as follows:

    pH : 8.2-8.4 during the day, 7.9-8.05 during the night
    Ca: In excess of 500ppm
    Mg: 1500ppm
    Alk: 9-10 dKH
    Salinity: 1.025
    Temp: 25-26 deg C
    Lighting: LED (Zetlight ZA1201)


    [​IMG]


    There is still a fair amount of algae growth in the tank. Had an outbreak about a month ago, but it appears to be receding.

    All other Acro's & Pocci's are happy and growing. ( See pics below)

    [​IMG]

    [​IMG]

    [​IMG]

    What am I missing ?
     
  2. AdS Guest




    to hide all adverts.
  3. TaahirS

    TaahirS MASA Contributor

    Joined:
    10 Jul 2014
    Posts:
    2,586
    Likes Received:
    284
    Location:
    Cape Town (southern suburbs)
    Looks like a growth tip to me.

    Especially if your other sps are thriving
     
  4. Apollo

    Apollo Thread Starter

    Joined:
    25 Sep 2008
    Posts:
    1,076
    Likes Received:
    67
    Location:
    Fourways
    Don't think so Taahir. The pics are very poor, but the tip looks more like dead coral and is white. The skeleton is visible on approx 0.5 cm. I would expect growth tips to resemble those of my hairy Acro frag in the pictures ( Sorry, I'm terrible with scientific names :p )
     
  5. puffer fish

    puffer fish

    Joined:
    29 Aug 2011
    Posts:
    509
    Likes Received:
    17
    Location:
    East london
    if it is dead algae should take hold there very soon and confirm
     
  6. williet

    williet Look at the shiny LEDs!!!

    Joined:
    29 Nov 2010
    Posts:
    1,141
    Likes Received:
    25
    Location:
    Amanzimtoti
    Iodine
     
  7. Apollo

    Apollo Thread Starter

    Joined:
    25 Sep 2008
    Posts:
    1,076
    Likes Received:
    67
    Location:
    Fourways

    Mhmm.... something I haven't checked for a while:022:
    The tank is very small (60l) and I found that my weekly 25% WC too care of all Ca, Mg , Iodine and other trace elements. Never needed to dose up to now. Nonetheless, a good suggestion to check Iodine/Iodide levels.

    Just strange that this is the only Acro frag displaying some receding...
     
  8. Apollo

    Apollo Thread Starter

    Joined:
    25 Sep 2008
    Posts:
    1,076
    Likes Received:
    67
    Location:
    Fourways
    @williet

    Thanks for the tip. I checked Iodine/Iodide levels yesterday and the levels were almost undetectable. Will have to get into the habit of cautiously dosing every 3-4 days.
     
    Last edited by a moderator: 26 Nov 2015
  9. williet

    williet Look at the shiny LEDs!!!

    Joined:
    29 Nov 2010
    Posts:
    1,141
    Likes Received:
    25
    Location:
    Amanzimtoti
    Good thing you can test for it. The golden rule is dont dose what you cant test. Alk is a bit high as well and cause ression in acros but your nitrients are high from what I can see so it is ok. i run my alk at 10-12 and I have no proba but I do dose acropower from julian sprung. Excellent supplement with excellent growth. You will also see with dosing Iodine your blues will be more pronounced
     
    Apollo likes this.
  10. Apollo

    Apollo Thread Starter

    Joined:
    25 Sep 2008
    Posts:
    1,076
    Likes Received:
    67
    Location:
    Fourways
    Thanks Williet,

    The trade off for me has always been growth vs coloration of Acro's. Whilst I have been able to spur on good growth, colour has been lacking or has only come about very slowly. Then again, the current tank volume is small so finding stability is challenging. I will be moving over most of the Acro's & Pocci's to my outside NSL tank soon, and the increased volume and NSL should make a marked difference.

    Will look into Julian Sprung's products in more detail.
     
Recent Posts

Loading...
Similar Threads - Tips receding bleaching Forum Date
SPS (Receding tips and general decline) SPS Corals 15 Jun 2007
[wtd] Bubbletips, bubbletips and bubbletips Wanted 1 Oct 2016
Clown Hosting tips General Discussions and Advice 19 Jul 2016
Calling all DIY LED builders for some tips Anything DIY Related 10 Jul 2015
Rock Pooling Tips? General Discussions and Advice 24 Feb 2015
Urgent help needed Sps tips look chalky then start to bleach Urgent Help Needed 15 Apr 2014
Any tips and advise??? Pico Tanks 10 Jul 2013