why are these zoas pulling faces?

Discussion in 'General Discussions and Advice' started by mandarinman, 20 Jan 2012.

  1. mandarinman

    mandarinman

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    some of my zoas are contracting with the outside ridge closing down instead of inwards. does anyone know why? . this is not a trick question .


    [​IMG]
     
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  3. salty dog

    salty dog

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    How's the flow around them? Looks like they are trying to expell waste. I wouldn't worry. They usually come right again in a few hours.
     
  4. mandarinman

    mandarinman Thread Starter

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    interesting . the flow in tank is by two 2500 lph wm3s which alternate. so that is bout 22 times an hour.
     
  5. salty dog

    salty dog

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    I meant more direct flow on them. Sorry. :)
     
  6. salty dog

    salty dog

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    Did you do a water change today?
     
  7. mandarinman

    mandarinman Thread Starter

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    Saturday waterchange. there is a lot of water movement in tank
     
  8. mandarinman

    mandarinman Thread Starter

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    not directly at them though
     
  9. salty dog

    salty dog

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    OK, let me tell you where I am coming from. There is an old man in Uitenhage where I grew up the has a tank that is older than Noah. He once called it sneezing. Your scape creates spots where the flow is less and then it is more difficult for them to get rid of waste products. So I'm not talking about overall cycling, I'm talking about specific flow at that exact location. They will be ok though. Just relax.

    BTW, you guys should see this old mans tank. It is something all of us on here can only dream about. :)
     
  10. mandarinman

    mandarinman Thread Starter

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    I had reduced duration each pump runs before switching so now I turned time pumps run up to change flow. lets see what happens. and thanks for the help
     
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