Zoa not opening all of a sudden. Reasons?

Discussion in 'Coral' started by JeremiahChua, Feb 18, 2010.

  1. JeremiahChua

    JeremiahChua Guest

    The blue tubs I got a few weeks ago have been going strong and quite healthy until today. When I first got it, it opened within 5-10 minutes of entering my tank. And has done so for the past few weeks that I've had it. It was my healthiest and most robust specimen in the tank. Today, I came home and found it closed up. Every single head on my rock was close (there must be 20+ heads).
    I checked my parameters, ammonia/nitrite/nitrate are all zero.
    Ca and Alk are lower than I'd like but it's in the low side of the safe range. Mg is 1140, which is low! I'm working on that right now actually, I just found out it was that low and quickly started dosing to increase it back up a little.

    In any case, could this be the cause of them losing up today? I don't remember if they were open or close this morning when I turned on the light, was running late. :(
    My other zoas, ricordea, paly and shroom are opened up just fine. I see a few heads closed up on some of my zoa/paly, but I consider that normal since it was probably something just stepping over it. Still, the fact that my tubs are all closed kinda worries me.

    I did a SW iodine dip, using kent's iodine.

    Is it normal for a zoa colony to just randomly not want to open up for one day or should I be alarmed and take this as an early sign of something bad coming?

    I added a large mushroom yesterday morning. It was from another reefer's tank to my own. The shroom opened up in no time and looked healthy. My tubs showed no sign of discomfort either and are a couple inches apart from each other (this is a 29G biocube tank). Could I have added something bad into my tank that the shroom was immune to but my zoas are not?

    Any help would be appreciated!
     
  2. Mr. Ugly

    Mr. Ugly Past President

    Check that your s.g. is not too high.

    Make sure you have enough gas exchange for your tank.

    If your canopy/lid is closed, you can try propping it open.
     
  3. Mr. Ugly

    Mr. Ugly Past President

    If you're dosing a bunch of 2 part and also Mg, that can raise your s.g.
     
  4. JeremiahChua

    JeremiahChua Guest

    s.a. is at 1.025 right now after adding the mg. Before it was at 1.023.
    mg has been increased to 12xx, I will be checking it again tomorrow morning to see if anything happened.

    I had white light off and actinic on since around 8 PM. I turned white back on with actinic still on at around 10 PM, after I came home from the gym to do some water testing and modifications.
    My tubs started to open up!! :) Not all, but some were opening. So perhaps it was just a lighting thing and they wanted to sleep early? I'm going to check up on them first thing tomorrow morning. They're usually the first ones to be up and open, waiting for light to shine on them.

    Wish me (them) luck!

    Thanks for the help so far.
     
  5. If you have any asterinas you may want to check to make sure none of them are sitting on the colony. Sometimes some specimens will prey on the zoos.
     
  6. JeremiahChua

    JeremiahChua Guest

    None, every time I get a frag or a new piece of coral, I always check for those buggers and remove them immediately. My tank is asterina-free to my knowledge.

    The tubs did open up today after I turned the lights on. They don't look as robust as they usually do but perhaps the iodine dip made them feel better to show their little faces again. I'm going to cross my fingers and call this as their path to recovering back to full health, as they were just a few days ago.

    Thanks everyone! :)
     

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