The Planted Tank Forum - View Single Post - Less light triggered algae
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Old 08-27-2011, 01:18 AM   #2
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A sudden change in conditions perhaps let algae take foot in your tank. Or it could have been that the algae problem was already nascent and you turned off the light just as the problem began to occur. Increase the light again and see if it stops the growth of the thread algae.
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