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Old 12-08-2005, 06:13 PM   #1
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When to change light bulbs?

I have 3 175W MH bulbs, and they are about a year old right now, if I remember correctly your supposed to change them once a year or so. Just trying to see if I am thinking the right thing or not. TIA
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Old 12-08-2005, 08:18 PM   #2
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I change my MH once per year and my PC once every 6 months.
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Old 12-08-2005, 08:23 PM   #3
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I dont know about MH but I do know I`m supposed to change my VHO`s every 6 months
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Old 12-08-2005, 08:59 PM   #4
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VHO 6-8 months , MH once a year and PC if I remember right 10-12 months.
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Old 12-08-2005, 09:02 PM   #5
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You mean I could have squeezing out another two months out of my VHO`s.
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Old 12-08-2005, 09:09 PM   #6
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As long as my corals look good and I dont have any cyno growing I squeeze every hour I can out of those babies..
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Old 12-08-2005, 11:23 PM   #7
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Be careful with the blanket numbers! A MH that runs 6 hours a day will last twice as long as one that runs 12. Look at the averages for a particular type of bulb and watch your tank. The tank will tell you when things have changed. Be ready and have the bulbs on hand when things start to look different, if you wait to order it may cost you some grief with unwanted growth. I learned the hard way.
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Old 12-09-2005, 11:42 AM   #8
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I dont want to wait for something to getn ready to happen. I change mine every 6 months (VHO) no matter what because I dont want algea or cyno or anything else to get a foot in the door. But that`s just me.
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Old 12-09-2005, 07:49 PM   #9
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maybe that answers some of my questions then...my corals have been acting kinda strange like not opening occasionaly, and im starting to get alot more cyno then i used to have...but then again my bulbs are about a year and 3 months old..ill change them and see if i notice a difference. It isnt my water so im saying its the lights. 8O
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Old 12-09-2005, 08:06 PM   #10
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It`s worth a try
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