Changing from T5 to MH

Discussion in 'Lighting' started by Gawiedj, 27 May 2009.

  1. Gawiedj

    Gawiedj

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    Finally my light unit arrived. :thumbup:
    I got a 1 x 150w MH (10 000k) and 2 x 24w T5 (actinic) unit.

    At the moment I have 2 x units with 4 x 14w T5 per unit = total 8 x 24w T5 (6 x 10 000k tubes and 2 x "Blue" tubes)

    Now I need some help on how to the change over from one to the other.

    How far above the waterline should I hang the light?
    Is it best to start quite far away from the water and lower the light over time?
    What photoperiod do I start with for the MH and for the T5 actinic?
    How much do I increment the photoperiod per day/week/month?

    Please advise:)
     
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  3. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Your corals will need to acclimatise to the new lighting, so start of with the MH 30cm above water level and then reduce it by 10cm every week until it is about 20cm above water level.
    You can run you MH's for 8 hours a day.
    No need to increase the photoperiod over time, as you will be dropping the height of the halides weekly :)
     
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  4. Gawiedj

    Gawiedj Thread Starter

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    Thanks Mek.
     
  5. Mekaeel

    Mekaeel Moderator MASA Contributor

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    No problem bud ;)
     
  6. riyadhessa

    riyadhessa

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    sori to hijack this thread...Mekaeel geez thats good advice i did not know that
     
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