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Old 07-09-2008, 09:46 AM   #31
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Have you noticed a difference in growth rate from these bulbs? I see you added an Orange Cap on the right side of the tank....
I am getting nice growth, but it's hard to say if it's just from the bulbs. I replaced 2 AC70 ph's with 2 Koralia 4's...so that's a big increase in flow too. Flow and lighting and big factors in growth. I had the orange cap a long time. I just moved it from the middle to the side.

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The Iwaskis 6500's (175w)and the XM 10k's(250W) are supposed to be the PAR monsters for their wattage.
These Iwasaki 15k's have the highest PPFD (71 w/magnetic ballasts) rating of any 175w 15K bulb Sanjay tested. It's higher than many 250w bulbs. As a comparison, 175w Hamilton 14K's are 29 PPFD. I don't think Sanjay tested the 175w Iwasaki 65k's, but the 250's are insane. PPFD is 189 (electronic ballast)! 250w XM 10k's are 182 PPFD.

PPFD = Photosynthetic Photon Flux Density
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Old 01-12-2009, 11:02 PM   #32
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Anyupdate on iwasaki?
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Old 01-12-2009, 11:29 PM   #33
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Welcome to AA!
Great bulbs. I'm very happy with them.
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Old 01-12-2009, 11:35 PM   #34
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do you run the actinics with them...
I have similair tank.. was looking to do 175w iwasaki on left and right and radium 250 in middle
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Old 01-13-2009, 09:15 AM   #35
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I run 3x175 Iwasaki 15k, 2x160 VHO SuperActinic and 2x40 normal output fluorescent daylights.
Here's a pic from 11-08 with all the lights on....


and without (1-09) the halides
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Old 01-13-2009, 09:18 AM   #36
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Man that`s a nice looking tank.
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Old 01-16-2009, 12:38 AM   #37
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I see that with the new lights your coraline algae has definitly has grown all over the back glass . Awesome tank.
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