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Old 11-01-2012, 09:44 AM   #1
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Ph

Dear reefers

Need help... Lately early in the morning my ph has been as low as 7.5 but around noon time it's already at 7.7-7.8... What's going on?
Thanks
Miguel
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Old 11-01-2012, 10:19 AM   #2
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Very well could be because your lights can affect ph. I run the lights in my sump opposite the lights on my dt for this reason.
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Old 11-01-2012, 09:05 PM   #3
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Very good article on pH - also explains the daily swings with the light cycle:

http://reefkeeping.com/issues/2007-05/rhf/index.php
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