Something about these ZOAS!

Discussion in 'Soft Corals' started by mytank, 7 Jan 2012.

  1. mytank

    mytank

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    Hi all,

    Firstly before I get asked:

    Salinity: 1026 - refractometer
    Phos: 0.1 - Hanna checker
    Nitrate: 10ppm - Salifit
    Nitrite: 0
    Ammonia: 0
    Alk: 12.2 (been running it high always even when they were happy)
    Mag: 1350
    Calc: 460'

    I run the nitrate a bit higher for the clams - don't have any SPS well have one but its a hitch hiker - encrusting Monti but its brown (yes I know why)


    So what is happening:

    All my corals are running super healthy, all extended all splitting heads, clams got new extensions on it, big zoas all multiplying like rabbits and pulsating xenia now becoming a pest.

    What's the problem, well I have a category for my Zoas big ones and small ones - simple enough. The big ones are the ones 10 cent size and bigger the small ones either a match head or up to 10c ***NOTE: they stay this size***

    What I have notice is all the big Zoas =<10c are growing like hell but I can't seem to keep the smaller Zoas 10c<.

    Good examples:

    1. I had what they call hand picked serbert zoas loads of tiny (only a single match head size) dark orange Zoas - they lasted a month.

    2. The pictures you see below is my fav Zoas. When I got them they were the only ones on the rock with one or two of the others (circled in blue). As you can see over the space of three months the big Zoas have grown and the small Zoas have almost completely disappeared :(

    What have I checked for:

    1. I looked for a month every night at all the hours of the night and the early morning for any nudi's, snails etc - found nothing (only yesterday found a BIGGGG snail see ID forum)

    2. Looked for flat worm - nothing

    What I have done:

    1. Dipped them in:
    1.1. Brightwell Coral Dip
    1.2 Coral X
    1.3 Seachem coral dip

    2. Given them a fresh water dip

    3. Moved them to all places in the tank from high light little flow, to little light high flow etc


    No matter what I can't keep these "small" Zoas alive. Seems like they the same as RIC's they just disappear in my tank...


    Anyone know whats going on?

    About two months ago (had them for a month or so):

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
    Last edited: 7 Jan 2012
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  3. Keanan

    Keanan 2time

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    It can only be something eating them, mine too started like that till nothing is left. I now only have one small colony left. I found small volcano like holes on mine that died back, which led me to believe snails or something ate them.
     
  4. butcherman

    butcherman Moderator MASA Contributor

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    How much flow have you got. your pictures look like there are alot of particls flying around?
    Also how ofthe are you moving/handeling the zoas?
     
  5. mytank

    mytank Thread Starter

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    The first picture yes that was about 4 months ago. Where they are now is by the clams with about medium to little flow.

    - Handling them well once a month to move them.... I only move them if they were not looking to good and these ones for some reason are not looking good.
     
  6. butcherman

    butcherman Moderator MASA Contributor

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    what lights are you running?
     
  7. erratiC

    erratiC

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    What's your tank temperature?

    I've got a bunch that are multiplying and another bunch that are dying but I think it's because my temp isn't stable and the dying bunch isn't as resilient as the thriving bunch.

    I'm just guessing here.
     
  8. mytank

    mytank Thread Starter

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    x4 24w T5's (two blue and two pink (gizzies))
    x1 150 MH 15000k
     
  9. mytank

    mytank Thread Starter

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    Hmm might be a good guess the tank's temp does fluctuate alot. I try keep it between 25 and 26.5
     
  10. erratiC

    erratiC

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    A difference of 1.5 degrees won't cause that much harm surely. My temp fluctuates about 5 or 6 degrees from around 24 all the way up to 30.
     
  11. Afsal

    Afsal

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    check for sundial snails ...
     
  12. maj

    maj

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    Wht fish in ur tank and inverts
     
  13. mytank

    mytank Thread Starter

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    got
    chromis
    anthias
    lawn mower blenny
    scooter blenny
    mandrin
    purple tang
    sand shifters
    six line wrasse

    inverts
    hermits
    cleaner shrimps
    fire cracker shrimp
    turbo snail
    mexican snail
    tux urchin

    one thing I have noticed is HUGE bristle worms at night
     
  14. mytank

    mytank Thread Starter

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    wouldnt it be chowing all my zoas then
     
  15. gMAN

    gMAN with the plan

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    Dude, got any asterina stars in your tank? I once found one on top of a polyp happily feasting away! I know not all of them prey on zoo's but there is a species that does, maybe on your water break tonight check for any of those suckers?
     
  16. mytank

    mytank Thread Starter

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    thanks gMan I will check been checking every night and havent seen anything will keep checking though. My lumo orange colany is almost completely gone :(
     
  17. gMAN

    gMAN with the plan

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    maybe build a platform using egg crate and get them off the substrate for a while and see if that makes a difference?
     
  18. mytank

    mytank Thread Starter

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    they on top of my rock right at the top of the tank now let see if that helps at all, not sure how much they like the full blast of the MH though
     
  19. RiaanP

    RiaanP Moderator

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    how HUGE is your HUGE?
     
  20. mytank

    mytank Thread Starter

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    10 to 15 cm and fat
     
  21. magman

    magman

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    what about your lighting, I have found zoas only live in inter tidal zones, and during low tide they are exposed to more sun, than any other coral's combined, and hence are more used to direct sunlight.

    If you got high k's in the tank, maybe try changing one to a lower 4k, you can get them for about R55 for 1xT5 from most local lighting shops. I did this with a mates tank with differant kind's of local zoa's, some grew to the size of shrooms, and it was only cause we built the tank on a budget and we used the cheaper R55 T5's which were only 4K.
     
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