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Old 02-04-2003, 01:23 AM   #11
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i would keep the 7100k on and try the 10,000k super daylight and see if there is a change in a week. red slime alga is nothing to get rid of. i can say i have mastered getting rid of that red stuff in a matter of days. IMO. if you still have that problem without seeing any change in a week, then remove the 7100k blue for a week and check that out. you can always put it back on later. 8)
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Old 02-04-2003, 02:17 AM   #12
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OK...if I'm not mistaken, going from a 6700k to a 10000k is going to increase the amount of blue light. My understanding is that as you go up in kelvin temp, you increase the blue. Also, the 7100k is not a true actinic. According to what I have read, true actinic has a spectral peak at about 420 nanometers where the 7100k's are just bulbs with a blue tint. How much difference this makes for our uses, I don't really know. I think I'd be tempted to cut back feeding some, crank up the skimmer if you can, and just run the 6700 for a few days. JMHO.
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Old 02-04-2003, 09:40 AM   #13
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I've cut the 6700k blue light off as of yesterday. the 7100k is acutally a daylight bulb with a hint of yellow light. I will be picking up a 10000k which is more of a pure white light. We'll see if any of this works. I had the water tested again and everything is coming out clean. I'm also thinking about doing a water change once a week. I think someone asked about the water I use. I buy both the fresh for toping off and salt for water changes at my LFS.
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Old 02-04-2003, 10:11 AM   #14
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Although your eyes may not perceive it, the 10000k has more blue light in it than either the 6700k or the 7100k.
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Old 02-04-2003, 01:36 PM   #15
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i agree with the blue light , but the higher white 10,000k worked for me. i'm just giving my opinion. i had 1 96watt pc and 1 20,000k marineglow when i had this same problem. when i put on the 10,000k super daylight in 1 week i could see the change. i'm not twisting anyones arm, just saying this worked for me. has anyone else tried this?
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Old 02-05-2003, 05:30 AM   #16
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i'm not twisting anyones arm, just saying this worked for me. has anyone else tried this?
Me either...if I sounded pushy I certainly apologize. I see where you went from a 20000k to a 10000k which is less blue spectrum. What I'm not getting is going from a 6700k to a 10000k which is adding more blue. What am I missing?
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Old 02-05-2003, 05:44 AM   #17
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Lower the number in "k", the more yellow light. The higher is more blue light.
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Old 02-07-2003, 12:24 AM   #18
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the 10,000k hi intensity purified super daylight peaks at 430 at a green/blue level. the o3 is right at 420 but that is blue period. the 2 96watt pc's are enough as they are, on examenation of the pc lights one could see that 1side is50% daylight and the other is a ultra actinic peaking at 460. so having two times the 460 blue is ok, but no more blue. this 10,oook bulb has more white/green than blue. other 10,oook bulbs just are not the same, they emit more blue, then green. the lower k is more yellow is not the case on all bulbs manufactured today.i wish i can find my fact finding sheet to past here, but i can not. i just know from personal exper also. walt. one more thing for freshmaker, what is your phos and silica readings?
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Old 02-07-2003, 12:29 AM   #19
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freshmaker, any change in your tank yet?
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Old 02-07-2003, 04:54 AM   #20
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Also, I would like to see if anyone has any suggestions for beating hair algae other than lighting? Maybe add some caulpera.
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