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Old 10-08-2011, 05:57 PM   #1
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How often to change light fixture tubes?

Do you guys follow manufactor's recommendations? Mine says effective for up to 10,000 hours. Or you change them once a year? I have a freshwater planted tank with 36" fixture with 2 T8 tubes.

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Old 10-08-2011, 11:40 PM   #2
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Regular output FL bulbs start losing their "mojo" after a year, but judge by the condition of your plants. I replace bulbs when they burn out, but I only grow Najas, hornwort, and surface floaters like Salvinia and duckweed.
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change, fixture, light, light fixture

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