HELLO!!! :) How long to leave the lights on???
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11-13-2012, 03:43 PM
Planted Tank Guru
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Join Date: Dec 2011
Location: New York
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.
"I am Groot", the faithful protector
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