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Old 02-23-2013, 02:51 AM   #3
sarahspins
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Phosphates don't cause algae... nutrient imbalances and too long of a photo period do. Stopping your ferts may have done more harm than good.

While your light fixture may not be too much for your tank, leaving it on for 11 hours a day might be.

More info is definitely helpful... such as test results (ammonia, nitrite, and nitrates) and how long the tank has been running.
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