boas
continuando a conversa com o nosso amigo Jamie e impolando um pouco as coisas para o meter no arame
com a ajuda do nosso amigo Pedro a fazer de tradutor mandamos a seguinte email
Hello Jamie
As you may see in the video
http://www.youtube.com/watch?v=ObKx5eEOJAcafter only 3 weeks of using the SR 360 illumina I lost all rose and
pink colours as they turned brown, and all the greens faded. One
notices that all deep water acroporas improved, namely the blue ones.
I'm obviously disappointed with this result as I expected more, far
more, from Illumina SR 360. You mention water chemistry as being a
more determining factor for the rose/pink results, well about that I
can tell you that at least if not more, every 2 weeks, more than 2000
liters of water are changed, and I use natural sea water. Before using
the leds I used T5 and all rose and pinks were very good as you may
see in other videos of my system. You mention the the UV-violet may
have effect on the development of pigments but none on the red/pink
pigment as well as the red leds, and from my short experience using SR
360 Illumina, the white leds are also not capable of stimulate the
red/pink pigment, so vertex Illumina led lights do not have spectrum
for the red and pink! ... anyway to upgrade my 2 SR360 Illumina 120cm,
how many of such UV-Violet and Red led modules do I need?
recebemos esta resposta
Carlos,
this sound to me that the white leds are running too high. I did the same thing as I first used the Illumina. I was replacing 2x 250 halides plus T-5. In the first three- four weeks, I though I had made a mistake choosing leds (I didn't work for Vertex back then), but then, everything started to settle in and the corals transformed into truly beautiful colours. Some did take a few months to really show their stuff.
I have noted that, typically, when a coral suddenly received too much light, it increases it's zooxanthellae as a sunscreen. It turns light brown. This is very true of white light, which is mixed, and with leds particularly strong. At the beginning, 50% or less white, with blues at bit higher and slowly bring up the intensities, as the corals get used to it. I expect at least 4 weeks for a coral to adjust its pigments with many corals requiring more time. If you wish to add UV-Violet and red, I recommend maximum one of each per 30cm of lamp. Of course, one can add more, but you will want to run them at a lower percentage. As much of the red-pink colouring is simply reflected light, you may prefer to have more red in the spectrum. We have been considering creating a multi red module for those that want to accentuate this part of the spectrum.
The colour of a coral is a combination of pigments and zooxanthellae. In nature, corals are capable of controlling their zooxanthellae, as they are in extremely nutrient limited waters. In an aquarium this is not always the case. Slow darkening of corals is often a case of too much dissolved nutrient in the water. On the other hand, in order to protect itself from too strong of sunlight, corals develope a few strategies. One is reflective pigments, another is zooxanthellae densities and a third is polyp extension (contrary to popular belief, strongly extended polyps are not necessarily a sign of health and happiness. The coral uses them to shade itself). With the combination of pigments and zooxanthellae, a coral arranges these components inside of its tissues in layers to maximise the benefits of its light environment. Some corals have the pigments near the surface to reflect away certain wavelengths, which is what gives them their colour. Other reflective pigments are arrange behind the zooxanthellae layer to reflect the light up toward the zooxanthellae. By altering these configurations, a coral can control its metabolism. If is needs to adjust to a new light spectrum, it rearranges these components as required. This takes time. During this period, many corals experience slight increases of zooxanthellae. If this is simply an uncontrolled reaction to the changed spectrum or a controlled response to protect the coral is still not fully understood. What we see is some corals paling, at the O2 levels in their tissues rise too high, which lead to the expulsion of the zooxanthellae or, especially in riff flat corals, such as the pocilliporids, the zooxanthellae increases to shade the coral. These corals have less trouble with O2 levels, as they come from regions of high water movement, which removed excess O2 quickly. In an aquarium, if the coral does not have enough water movement, it will struggle as it changes over. This is why any change in lighting should be done slowly and in steps. Even changing tubes or halide bulbs should be done with some filtering of the light to prevent burn and stress.
acreditem que é de louvar o Jamie estar a perder tanto tempo com a questão na tentativa de ajudar,a maior parte do pessoal vendedor dentro do hobby não me ligava a minima
;
O valor das coisas não está no tempo que eles duram,mas na intensidade com que acontecem.
"por isso,existem momentos inesquecíveis ,coisas inexplicáveis e pessoas incomparáveis"
"Fernando Pessoa"
Cumprimentos
Carlos Mota