The Planted Tank Forum - View Single Post - HELLO!!! :) How long to leave the lights on???
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Old 11-13-2012, 04:43 PM   #2
ओं मणिपद्मे हूं
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generally speaking 8 hours. however if your tank is running the RAY2 sans co2, you might want to run it for slightly less to curb the algae growth.
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