I am not sure if you sen this chart before you bought the Ushio 20 K? But there is not much value to that type of lamp
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The red zoas you can see in my picture looked just like that under my T5s before the tank crash which obviously took the better of them. Yes, this is what I want and I was under the impression that this is what I will be getting with MHs since, you know, they color up corals better than LEDs. Sorry for the sarcasm. I had to haha. I want healthy colorful corals and if MH won't get me there I will do the switch back to T5s or even LEDs. Regardless, I will stick to what I said. I will let the tank adjust and let the Ushios do its thing. I really like the color temperature of the tank now. I have drab looking corals so it would be hasty blame the lack of coloration on the fact that MHs won't make corals fluoresce like LEDs.
This has become so convoluted I don’t think anyone is grasping the spirit of the MH argument, as indicated by the responses that keep coming in. Use what you like and what you want. Don’t worry about what someone else thinks you should use. Look at peoples tanks. Find ones YOU LIKE. and do what they do. If you have yet to see a tank with actinic pop under pure metal halides, then they’re not for you. If you have seen it, emulate that lighting, and if it still doesn’t look the same, then the lights are not the culprit. There’s more to color than lights. I can shift my coral colors dramatically by manipulating water quality and flow
Halides will bring out the true colors of coral.. Meaning you do not need a bunch of blue to see the coral colors.
Yes there are too many
Blanket statements and unrealistic expectations going on. It’s a new school mindset, being alerted to an old school methodology. They just aren’t compatible. Square peg/round hole kind of thing
Nonsense! This is what I'm talking about! There is no such thing as "true" color. Every coral will display a different color depending on the spectrum it is subjected to. If you determine MH colors to be "true" you are implying that LED or T5 colors are "false" which is a flawed argument. Blue light will not bring out the color of corals if the coral doesn't have pigments to begin with or the pigments that respond to blue lighting such as green. Green will always pop under any blue light because the pigment responds best to the blue end of the spectrum. But reds, pinks, etc. won't. A pink birdsnest under royal blue LEDs looks like sh...! You will need to introduce reds and greens to bring out these pigments. It doesn't matter whether those greens and reds are delivered by MHs, LEDs or T5s. However, the controllability of LEDs gives you the option to individualize the spectrum to bring out the pigments of all of your corals. If you want to bring out more greens, you'd have to go for a 20k bulb. If you'd like to bring out some reds and pinks you might love a 14k bulb. But what if you have all of these colors? Then there will be a trade-off. Some coral will look stunning some won't. With LEDs this not an issue anymore because you can control the spectrum. And this is also where all the issues arise when people run weird spectrums that hurt the corals. If you get a frag from such a person, yes, it will look super discolored under your MHs. But that doesn't mean that LEDs won't color up corals as "nicely" as MHs. I could argue that Radeon fixtures bring out the "true" color of corals based on my subjective impression of colorful Radeon SPS tanks. And if you told me that this is just because of the royal blues I'd go on to claim that you are not used to see the "true" colors of these corals because your metal halides won't show every pigment in every coral due to the fixed spectrum. How would you be able to prove me wrong? You couldn't because, at the end of the day, it's a visual and very subjective hobby.
The only sensible person is Bbp because he basically says it is subjective. Go for what you want to see. Emulate what others do and don't listen to other peoples subjective descriptions of "pop" or "colorful" or "true colors". What a piece of SOUND advice. I'm unsubbing from this thread.
I don’t call them real or fake color, it’s just about using your lighting correctly to both develop, and express what you want to see. And being patient in the process. You can’t just shuffle back and forth between lighting tech, led settings, or bulbs and expect to have any indication whatsoever of what the corals will appear like. It’s going to take weeks to months to grow the pigments in their tissue that they’re being influenced to grow based on their available light.
No...it doesn’t look like you’re on drugs like a lot of corals do. That where I differ strongly with the OP. I don’t think a tank under 10-14k lighting is ugly. I find excessive fluorescence to look odd and tiresome. Like the glofish tanks at pet smart, or like playing laser tag/mini golf. The black light effect wears on me and I could do without it honestly. I genuinely think a natural looking tank is more pleasing to view. 10-14k is bright, vibrant, and just blue enough to get subtle differences in color among the sps. The big massive RC TOTM winners in the 2000-2010 era are the absolute pinnacle of goals for me in what I want my tank to look like. Not much fluorescence going on.
The best MH lighting was 10K metal halide lamps with multiple T12 VHO True Actinic lamps. This covered all ends of the spectrum. Purple Tang tails looked almost orange they where so bright yellow. The problem is no more T12 VHO Lamps!
I agree with most of this post but this part is me right here.
This is why when I ran Iwasakis I added actinic or my when I switched to Ushios.. I like a whiter light and add the actinics for a little pop and a little more blue. Some where around 10,000 kelvin to 14,000k is what I like.
I just do not like the day glow colors. It is not natural and when I dive I do not see that..
With T5 I go for the 10-12k look and add two actinic lamps for a little pop (fluorescence).
And when I speak true color I mean a coral that looks good under white light and you see the actual color of the coral.
When you look at the first picture in the link below of the coral out of water. The ones that show the color in sunlight are what I like.. Those brown ones may be awesome under royal blue leds or blue + who knows but they do not under white or full spectrum light they are brown. That is what I am talking about when I say true colors.
A Response to ABC’s Media Watch’s “Shoot the Coral Messenger” Flimflam!
Guest essay by Jim Steele Director emeritus Sierra Nevada Field Campus, San Francisco State University and author of Landscapes & Cycles: An Environmentalist’s Journey to Climate Skepticism Gre…wattsupwiththat.com
Ok first I agree w/ you but in doing research there are only about a dozen "reflective" pigments w/ orders
of magnatude more of flour. pigments.
Note in the GBR pic all you really have is brown, yellow, and purple..AFAICT.
There is def a "philosophy" between flor vs natural (and the continuum in between)
Yea I know.. just shows how complicate it all really is.. and a minor point what "color" is the "real" color of various species..Maybe it is also one picture.
But there brown corals everywhere on the reef. Collectors are taking the most colorful corals for the hobby though. Look at allot of the A humilis corals and how many colors they come in and are a very shallow water acro. It is one of my favorites but requires massive flow in different directions.
We must be careful to avoid the pitfall of thinking a single environmental parameter alone is responsible for coloration – many factors are synergistically linked. Although light certainly seems important, photosynthesis depends upon a source of inorganic carbon (such as bicarbonates – ‘alkalinity’ – or CO2) which in turn could be potentially limited by insufficient water flow. By the same token, CO2, due to coral and zooxanthellae respiration, could possibly accumulate within the stagnant boundary layer surrounding the coral and thus drive pH downwards. Temperature is probably less important to the coral animal than its resident zooxanthellae. However, loss of zooxanthellae could be catastrophic to the coral so, naturally, avoid temperatures approaching 80ºF or so. Carefully monitor any corals directly under metal halide lamps for loss of pigmentation due to ‘spot warming’ resulting in bleaching.
The only chromoprotein identified in an aquarium coral, so far, is Pigment 580. Currently, it is known to occur in only Acropora specimens. This chromoprotein seems to be expressed at relatively high light levels (~400 µmol·m²·sec) when other factors (such as those mentioned above) are correct.
Though only briefly discussed, hobbyists should abandon the thought that ultraviolet radiation is responsible and therefore necessary for inducing the expression of chromoproteins. It is apparent that violet and blue wavelengths can also cause coloration shifts. Excessive ultraviolet radiation usually isn’t a problem with fluorescent lamps and it is definitely not a problem with the newer LED luminaires. However, hobbyists should shield their metal halide lamps for UV radiation by using acrylic panes. For those doubters, I’ll present some information on the effects of UV on some fluorescent proteins in the next installment of this series.