The Planted Tank Forum - View Single Post - HELLO!!! :) How long to leave the lights on???

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post #2 of (permalink) Old 11-13-2012, 03:43 PM
acitydweller
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Join Date: Dec 2011
Location: New York
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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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