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Old 05-06-2011, 12:51 AM   #11
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I don't use the actinics. Just the 2-6,700Ks and 2-10,000Ks. I recently replaced the 10,000Ks with new ones that's why I have 2 old bulbs. Now I'm thinking of replacing the actinics with the old bulbs. Making my fixture 6-65W on a 125g. I run CO2 and dose ferts. So far I have 2wpg n my discus tank.
Yep, I figured you didn't...just was pointing out that if you wanted to run more lights, the old 10Ks would be better IMo then the actinics. If you are already running Co2, then the extra wpg shouldn't hurt anything. It's really your call.
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Old 05-06-2011, 01:01 AM   #12
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How does it fuel algae? Even with other new bulbs? How often do you change your bulbs?

If all of your bulbs are old and not functioning properly, then the plants will not be getting the right spectrum they need for growth...hence giving algae an opportunity to grow. Not really something I'd think you'd have to worry about in your situation.

Is it ideal to replace bulbs every 6 months? That's going to be expensive.
I've heard so many conflicting reports- anywhere from 6months to a year. I am sure the amount of time each individual runs their fixtures everyday can play into that. 6 months for the fixture on my 37 gal would have been May, but I just got a new fixture (switching over to a 50 gal) so I guess I don't have to worry about it for a few more months
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Old 05-06-2011, 01:03 AM   #13
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Hi Alisha,

So I ended up replacing the actinics with the old 10,000Ks. You said that the extra lights won't hurt the plants but does it have any benefits? Maybe a little? Or is it just as good as not adding it?
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Old 05-06-2011, 01:18 AM   #14
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Of course the whole factor here is that we don't know is just how old the bulbs are, but you're talking a difference between 2 wpg and about 3 wpg. With the higher watts you might begin to worry about the need for Co2, but you're already supplying that. I don't see a down side to running them at least for a trial period, but then that's just my opinion.
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Old 05-06-2011, 01:22 AM   #15
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Of course the whole factor here is that we don't know is just how old the bulbs are, but you're talking a difference between 2 wpg and about 3 wpg. With the higher watts you might begin to worry about the need for Co2, but you're already supplying that. I don't see a down side to running them at least for a trial period, but then that's just my opinion.
My photo period is usually 9hours but when I added the other 2, I lowered it down to 7hrs to see how my tank reacts(?) to the light. I even split the photoperiod to 4 on, 4 off, 3 on.
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