The right light for a Nenny

Discussion in 'Invertebrates' started by Copperband, 17 May 2007.

  1. Copperband

    Copperband

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    I have 2 nennies in my tank a green carpet and a magnificent. Now the green carpet is as happy as a pig in you know what but everytime the magnificent gets to much light it sulks. I have now covered the tank section where the nenny and my LPS's are with 40% shade cloth and the change in them are dramatic. I doubt that the LPS has light shock because they've been in the tank for almost 5 months now.

    Ok the question is, we all know nennies like bright light but do we
    distinguish between bright and extreme light or rather what is the real lighting requirements of nennies?
     
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  3. Alan

    Alan Admin MASA Contributor

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    CB what lighting are you using at the moment?
     
  4. viper357

    viper357 Admin MASA Contributor

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    what is the distance from the nenny to the light
     
  5. Copperband

    Copperband Thread Starter

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    about 75cm to 80cm Viper, the light is VERY high due to temp issues. Its a AM aquasunlight it has 2 150W MH and 2 actinics its a 1.2m unit.
     
    Last edited: 17 May 2007
  6. viper357

    viper357 Admin MASA Contributor

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    Is it a new addition? When you say "it sulks" what do you mean by sulking (what does it do) and how long does it sulk for?
     
  7. Alan

    Alan Admin MASA Contributor

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    Wow those lights are high, i wouldn't say you should have a problem. Maybe use egg crate as a diffuser and remove it for portions of your lighting period gradually extending the period until the nenny has acclimatized.
     
  8. Copperband

    Copperband Thread Starter

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    its been in the tank for a month now Dean, the tentacles deflate and it just looks miserable. Its gotten much better since adding the shade net.
     
  9. Bristlebasher

    Bristlebasher

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    Hi there

    When you say

    is it inflating more ? - as this would be the natural response to NOT getting enough light - as it is an attempt to expose more surface area to light .

    The light is most definately not enough at the present height of 80cms 150 watt's aint gonna do much placed that high from a coral.

    I assume your LPS is now also inflating more ?But more likely a response to a lack of light.

    This is unfortuanately not allways a sign of good health.
     
  10. Smithers

    Smithers

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    What are the signs of a healthy Nenny then ? My nenny is huge during the day. I have had it for over a year now and it always does this. Even with the MH on ?
    Sorry for the thread Hijack ...
     
  11. Bristlebasher

    Bristlebasher

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    Good expansion(obviously) in the right conditions , good colouration without any bleaching,active tenticles,closed mouth and good feeding response when offered food.
     
  12. Copperband

    Copperband Thread Starter

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    Thanks BB i'll take note of that, its just previously my torch coral would not extend its polyps at all and now there is polyp extension. Same with my shroom's they looked really poor under the bright light all shriveled up, now they nice and open.

    Also guys plz remember this was a 150x45x45 fresh water tank so its really not that deep.

    Would you suggest I drop the lights down again?
     
  13. Alan

    Alan Admin MASA Contributor

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    CB what globes are you running and does the fitting have a some kind of UV shield?
     
  14. Copperband

    Copperband Thread Starter

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    Alan its an Aquamedic Aquasunlight 150, it has 2 150W MH and 2 T5 actinics. Yes the unit has a UV shield.
     
  15. Alan

    Alan Admin MASA Contributor

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    I would try the egg crate filter method and once the corals are able to run a full light cycle then start lowering the lights slowly.
     
  16. Copperband

    Copperband Thread Starter

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    Metal halide
    aqualine 10000 and Ocean Blue flourescent tubes.

    Cool thanks i'll try that.

     
  17. Bristlebasher

    Bristlebasher

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    Would that make your lights about 50cm from the top of the tank at present ?
     
  18. Copperband

    Copperband Thread Starter

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    yupp. i removed the shade net for about 1/2 hour on sunday and had a sulking nenny again. Gonna have to put it under T5's or lower down in my nect tank
     
  19. sunburst

    sunburst

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    Great lights Copper. I would get a deeper tank if i were you. try running just the t5's. 45 is very shallow
     
  20. Copperband

    Copperband Thread Starter

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    sunburts, yupp new tank on its way
     
  21. sunburst

    sunburst

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    Great. Look forward to updates
     
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