Coraline algae colouration

Discussion in 'General Coral Care' started by Stressed Eric, 10 Jul 2009.

  1. Stressed Eric

    Stressed Eric

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    Hi all, I've been watching a piece of rock obtained from a friend, coated with coraline algae, slowly change colour from a dull red to pink to light pink, my daughter loves the colour but I'm worried it's not healthy . . . The rock is in my dsb and is about 15cm away from a 6500k energy saver light, my nitrate's and nitrite's are zero and ammonia at 0.25ppm, pH is 8.2 It's also not spreading to my other rock as I wanted. Any ideas on how to increase it's growth, and is coraline able to bleach ?
     
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  3. Tony

    Tony

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    It sounds fine but you can really get things going by supplementing calcium and magnesium which coralline need for good growth
     
  4. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Hi Stressed Eric.What are your current Ca, Mg and Alk parameters?
     
  5. jacquesb

    jacquesb Retired Moderator

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    Also - your phosphate levels MUST be as low as possible, as phosphates inhibits the growth of corralline algae and corals.
     
  6. Jaco Schoeman

    Jaco Schoeman MASA Contributor

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    Okey guys, just tagging along and stealing the tread quickly;

    But what color should healty coraline algae be? I had the light pink, and dark purple grow right next to one another. Is there a diffs in color / species maybe?
     
  7. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Jaco, the color of coralline algae differs depending on the depth that they grow at. From what I noticed in my system. I get the darker coralline algae growing at the lower portions of the reef as compared to the top where the lighter coralline grows.
     
  8. Stressed Eric

    Stressed Eric Thread Starter

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    Hi Mek, I only test my alk, and it's a bit low at 11 - I'm going to dose a bit of bicarb and lime to rectify, but will be guessing the Ca and Mg - there should be no draw because all I have at the moment in the tank is millions of really fat pods, couple of bristleworms, brittlestars and damn hydroids by the dozen .....
     
  9. jacquesb

    jacquesb Retired Moderator

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    Hi Jaco / MArk - YES - there are different species and subspecies of corralline algae....
    And yes - they live in different light environments - and yes - the species will determine the coloration....
     
  10. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Stop dosing Bicarb Eric. You Alk is very high. Alk should be 6.5-8.5 DKH (NSW levels).
    What were you dosing for Ca?
    I suggest you test Ca ASAP.
     
  11. mnd123

    mnd123

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    I noticed that when I upgraded my lights the Coralline changed from deep pink to light pink almost overnight. Now, where the coralline is in shade it is much darker than the coralline that is exposed to the 6xT5's and 2 x 150W MH's
     
  12. mnd123

    mnd123

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    Oh - and to add to that, my Ca, Alk and Mg are all optimal - this was defo the lighting upgrade
     
  13. Stressed Eric

    Stressed Eric Thread Starter

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    Sorry, boo boo, alk is at 1.8mEq/l - not sure how that converts into DKH . . . Dunno where i got the 11 from (blush) . . . Never added anything other than fresh umhlali water after a SW 's been blowing . . .
     
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