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Old 05-26-2005, 03:15 PM   #1
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pc bulb cahnges

how often should i change out my pc bulbs?

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Old 05-26-2005, 04:14 PM   #2
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I think this thing is spoken about every other post.

Every 6-9 months. Some go longer, but then you're risking the health of your corals... if you wait for it to dim to a great extent, and then replace them, your corals might bet shocked by the instant increase in light intensity.

Make sure to check and read the old postings and use "search" to find quick answers.

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Old 05-26-2005, 04:51 PM   #3
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I've also heard closer to 6mo. The spectrum changes before the brightness so while you may not notice the light changing, the corals will and will react accordingly. Best to beat the curve and keep your light spectrum appropriate to the corals you're keeping. FO I'd probably go a little longer, personally. Probably to 9mo anything past that and you'll risk algae issues, from what I've read.

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Old 05-26-2005, 05:03 PM   #4
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Depends on the bulb type. Normal fluorescents should go about 6 months. power compacts and VHO's you can stretch to 9-12 months before they lose too much spectrum.

FYI, your daylight bulbs are still useful to freshwater aquarium plants, so you might give them to a friend, or save them if you also keep (or plan to keep) planted tanks.
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Old 05-26-2005, 09:06 PM   #5
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I do my PC bulbs every 9 months. VHO I replace every 12 months.
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