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Old 09-27-2005, 01:04 PM   #1
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What a difference a light makes

I just ordered 4 new bulbs for my 4X65W PC light. I had not changed the bulbs in 10-12 months and all I can say is WOW!!! I had started to see some hair algae growth as well as some other algae and figured it was probably from the lights since I have not had this problem until recently and all my parameters are in check. The new lights look amazing compared to those old bulbs. The thing I notice the most is the blue of the actinic really shines brighter giving that nice purple glow in the tank. I just wanted to share because I was so amazed at the difference I saw after changing them!!

I also have a question. How long do you expect it would take for this algae to die off now that I've changed the bulbs? I use RO/DI water and my nitrates are >5ppm so I am assuming it was the bulbs that caused the growth. Just hoping it goes away soon!

Thanks for listening.

tripper
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Old 09-28-2005, 12:48 PM   #2
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No one has any suggestions?????
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Old 09-28-2005, 02:03 PM   #3
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did you test your PO4 level?
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Old 09-28-2005, 02:24 PM   #4
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Yes, my PO4 is zero. I am assuming the excess algae is from the old lights. They emit different spectrums and can cause algae blooms. If that's the case, I'm just curious to know how long will it take for this to die off if I have the new lights on?
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Old 09-28-2005, 03:09 PM   #5
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I am assuming the excess algae is from the old lights...I'm just curious to know how long will it take for this to die off if I have the new lights on?
I noticed this also before except w/ VHO's at about 10-11 months. The hair algae went away fairly quickly, maybe a couple weeks at most. Removing what you can manually will help. If you have corals be cautious. I burned some star polyps when I changed the lamps.
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