Hot!Cyano bacteria and lighting

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AJ
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Cyano bacteria and lighting

How much does lighting affect cyano algea ?
I find it interesting as there is one older bulb in the 180 and that area has loads of cyano, where there is nearly none in the other two thirds of the tank.
Is there a meter that measures kelvin output?
#1

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    Fishtal
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    Re:Cyano bacteria and lighting (permalink)
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    As bulbs age their spectrum shifts toward red and cyano likes that color.
    #2
    AJ
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    Re:Cyano bacteria and lighting (permalink)
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    It seems pretty weird though. 
     
    How a 14k bulb can get reddish?!
    #3
    Fishtal
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    Re:Cyano bacteria and lighting (permalink)
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    From the way Deb explained it to me long ago, the change isn't enough of a change for our eyes to perceive but enough that algae notices.
    #4
    CableGuy
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    Re:Cyano bacteria and lighting (permalink)
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    What kind of bulb?  T5, MH, PC?
     
    I find it is more of a nutrient issue, not a lighting issue even though you might be seeing it more under one light.
    -Adam
    Learning more everyday!
    #5
    AJ
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    Re:Cyano bacteria and lighting (permalink)
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    It's a 250 watt DE halide.
    I wish I took a pic of it.  It really was remarkable.
     
    #6
    CableGuy
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    Re:Cyano bacteria and lighting (permalink)
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    According to Sanjay's latest article on MH's, it seems they can last quite a while before they go bad.
     
    I think after 1.5 years the PAR was at like 78% and the spectrum really didnt shift yet.
    -Adam
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    #7
    slosht
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    Re:Cyano bacteria and lighting (permalink)
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    Maybe the cyano doesn't like high intensity and starts to thrive after the PAR starts to decline?
    #8
    cmpenney
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    Re:Cyano bacteria and lighting (permalink)
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    Could be Josh,
     
    I'd look into replacing the bulb and see if that helps. Worse case you are one bulb ahead for the next replacement cycle.
    Chad Penney - MASM President
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    #9
    AJ
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    Re:Cyano bacteria and lighting (permalink)
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    I did change out the bulb for a better one  I had.  But alot of the cyno is back (only in that area)  I found out though, that that particular area is getting blasted with sunshine in the afternoon until sunset.  Perhaps that is a contributor?
    #10
    cmpenney
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    Re:Cyano bacteria and lighting (permalink)
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    Yeah that would do it.. Anyway you can shade it somehow?
    Chad Penney - MASM President
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    #11
    AJ
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    Re:Cyano bacteria and lighting (permalink)
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    I'll have to stop in on an afternoon, and see what i can do.
    #12
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