<a href=showthread.php?s=&postid=8774489#post8774489 target=_blank>Originally posted</a> by Kshack
OK all you Solaris owners, what are your thoughts.
I have two 60 inch 20K units for about 1 mouth (tank is 36" wide). What have you done as far as programing? I tweaked the photo period so the lights go on for 11 hours on the shortest day of the year, to 13 hours on the longest. What about cloud cover? Mine are at 55% for 8 minutes 8 times per day. Moon light? I went from 10% down to 6%, but still think is too bright at full moon.
How have your corals reacted? I have some frags that have lost some color. Polyp extension is still good, but color has faded. This is usually a sigh of too much light, but not sure if I should just wait it out or change position or possibly more cloud cover. Anyone else have any comments?
Let's not argue if these things are the lights of the future, but rather how experienced users have programmed their units.
You see similar effects when running halides and T5s that have a very narrow output in the blue spectrums. IME, its from alot of blue, which the corals use most of, and little else, which these LEDs are guilty of more than any other light. Someone else contacted me about this and my suggestion was to add a couple T5 strips to the sides of the fixture... a midday and a blue+ (to balance the midday). This provides more light in the warmer and green spectrums that brings the pigments out. I have seen high output systems with a load of blue. Like a system that was 3x400wattRadiums, which, on e-ballasts as they get older, turn more and more monochromatic as they just lose their daylight outputs all together. Then add to this system a good 320 watts of actinic VHO. Well... the tank looked very blue, and everything inside the tank was blue no matter if it was green, purple or red. Many of the corals ended up doing what you are mentioning... turning pale white/blue.
Similar things have been noted with T5s... people running aquablue bulbs for daylight, blue+ bulbs for supplimental blue, and actinics means little of the warmer spectrums, as the aquablue/11,000Kish bulbs are really mostly blue still. Some have added a single 3000K bulb to help corals pigment in better, and its been shown to work.
Those 'white' leds that the PFO uses are really heavy in the blue still... with minimal amounts of red/green. LEDs are going to require better husbandry by aquarists in the future as LEDs are known for their near-laserlike monochromatic looks. You can get actinics that are only 420nm. You can get blues that are only 450nm. Even the whites arent really that 'white'.
It was seen as an advantage by some... having so much blue... but when you get to the point where there it little else (as with these), the corals just have no reason to develop pigments that reflect these other colors. Thats why PFO added a couple red LEDs to the units, and I would speculate that they end up adding a couple 3000Kish LEDs in the future to help the red/orange/and yellow pigments show better.
I had similar problems with a pheonix 14,000K bulb... loads of blue, but little else. Many corals at the top of the tank were simply fading out...growing great and getting loads of output though. I switched to a ushio 14,000K with blue+ supplimental bulbs, and the colors came back in.
It seems that corals can not exist on blue alone.