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I found very interesting post in RC about SPS coloration

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RC에서 글 보다가 공감이 가는 글이라 퍼왔습니다.
한 번 보시고 의견 나눠 보시죠...
저는 노란색 SPS가 없는데 이거 구해봐야겠습니다. ^^ 노란색이 기본이네요..

Please note: I am assuming that you meet the minimum suggested standards to keeping SPS; strong lighting, calcium at the appropriate levels, strong skimming and live rock.


Yellows

Highly dependent on Nitrate and PO4 levels. Of course all SPS colors are highly dependent on lack of N and P so I wanted to start with probably the easiest color to get, yellow. Yellows are sort of you baseline; yellows will tell you a lot about what is going on in your tank, what is needed and what is overdosed. Nitrate and/or PO4 reduction is most important, either through technical means such as nitrate/phosphate reducers or biologically through DSB, Carbon dosing and/or water changes and fuges. Basically, if you want to do SPS, I would suggest starting with an acropora that is yellow. If you can get it to say yellow for several months, you should be ready for something else.
==> 노란색은 질산염과 인산염에 대한 의존도가 높습니다. 그래서 노란색을 통해 현재 어항의 질산염과 인산염의 상태를 파악할 수 있습니다. 노란색 아크로포라로 시작하는 것이 좋고 몇달동안 잘 키운다면 다른 것들도 키울 수 있습니다.

Greens

Greens would be the next easiest color to tweak. Most green coloration can be achieved through the addition of an Iron Concentrate (Kents is what I use, however Iron is Iron). You must be very careful with Iron because it is also an Algae accelerator; this is why it is so important for you to get your yellows colors first (your N and P will be lowered).

Additionally, I use my yellows as indicators for my greens and blues. You'll notice a deficiancy if your greens are brown color or they are paling in color. I start off by dosing Iron at about 1 drop per 50 usg twice a week and take note of what happens, color changes, Algae growth, until my yellow acroporas display a green shimmer (it wont be a solid green but a shimmer of a green/yellow).

Please note, a sign of overdosing is a darkening of tissue, when this happens you have added too much iron or too much iron is being added. Another sign of overdosing is Algae growth, stop immediately and possibly do a water change if necessary. Like everything else reef, go slowly.
==> 녹색은 그다음으로 쉬운 개체입니다. 대부분의 녹색은 철성분을 추가하면서 좋아질 수 있지만 이끼를 늘릴수도 있습니다. 만약에 녹색이 갈색으로 바뀌거나 색이 빠지면 철성분을 50갤런에 한방울씩 주는데 많이 줄 경우에 이끼가 늘어나거나 노란색 아크로가 녹색을 띄게 됩니다. (여기서도 노란색 아크로의 역할이 크네요)

Blues and some purples

This is mainly for blues but I have found is can also have an effect on purples. The supplement for this is Potassium Iodide Concentrate or Lugol뭩 solution, ESV Potassium Iodide Concentrate will also work; don뭪 just get something that says Potassium because that is a little different. Dosing should be done when blue colors become less intense. Again, using yellow corals as indicators, stop dosing when yellow corals display a green shimmer.
==> 푸른색이나 보라계열의 일부 개체는 PI concentrate나 루골용액을 통해서 색이 향상 됩니다. (KZ제품중에 PIF가 있습니다.ESV에서도 나오나 보네요) 이 potassium Iodide는 potassium이랑 성분이 좀 다른 것이니 주의하세요. ^^ 색이 빠졌을 때 넣어주면 좋습니다.

Reds/Pinks and some Purples

Primarily for coloring reds and pinks in Montiporas, Pocilloporas, Birdsnest, other Stys and Seriatoporas. The supplement is Potassium (not potassium iodide). If you are using a high potassium salt mix such as Oceanic, Tropical Marine Pro and you are doing regular water changes, you are more than likely not going to need to supplement this much.

For dosing you can use your monitporas, especially caps as indicators. Supplementing is required when Montiporas display slower growth and appear washed out to grey appearance. Indicators on Stys and Pocs are when they look like they have been exposed to air. Polyps are completely withdrawn and colors are light. Other indicators of potassium deficiency is when the pinks turn into a light brown and when acroporas loose their color and get lighter and pale. A major potassium deficiency is seen when tissue is lost, mostly starting from the base opposed to spotting (patchy look). And overdose can lead to tip burning so don뭪 mistake tip burn for new growth. Tips burns will be white with no polyps.
==>분홍과 붉은 계통은 보통 몬티나 포실리,버드네스트, 스타일로포라, 세리아토포라같은 개체에 많은데 potassium을 줍니다. (kz사의 k-balance) 몬티의 성장속도가 더뎌진다던지 색이 빠지는 경우라면 이 원소를 투여해주면 좋습니다. 분홍색이 갈색으로 변한다거나 tissue가 없어지면서 바디에 하얀 점처럼 보이는 것도 포타시움이 부족한 때입니다. 너무 과하면 팁이 타들어가는 tip recession이 생길 수 있습니다.


Purples

Probably one of the hardest coloration of all acroporas from my experience since it is a combination of several variables.

First and foremost is water clarity, which means Carbon and/or filter socks. I have also had good result from biological filters such as using cryptic zones, which produce seasquirts, sponges and other filter feeding animals. Zeo Sponge Power, which can be used in any system, feeds sponges. Sponges are great because they can filter a mass amount of water for better water clarity.

From what I have noted, increased water clarify will first effect SPS tips but not the complete base. I have seen nana and valida with really nice purple tips but brown/tan/white bases. I have seen the same nana and valida in another뭩 tanks, which met all other parameters with a full purple from base to tip.

Second being lighting. From my observations of my own tank and others, purples seem to love 420-440nm range light spectrum, those found in actinics and 20K halides. Some of the best purples I have seen are in tanks that have 440nm blue actinics (ATI Blue+, Giessman Actinic) or 20K Halides (Radium, XM 20K).

Third, supplements such as Iodide and Potassium (see blues and Reds/Pinks). Again, make sure your greens are green and yellows are yellow. Your blue should be bright with depth. Iodide will also help if you have tip burn.

These are just my observations through testing and I am sure in the future other factors will be seen and added. Please feel free to comment with your own observations, data is very important to moving forward.

==> 보라색이 가장 어렵습니다. 물의 안정화되고 깨끗해야 하는데 스폰지가 필터 역할을 해주므로 kz의 sp를 써서 스폰지를 키우는 것도 좋습니다. 하지만 깨끗한 물은 팁색은 좋게 해도 전체색을 만들어 주기에는 좀 한계가 있습니다. 보라색의 경우 액티닉을 좋아하므로 20K의 메탈이나 많은 액티닉 등을 사용하는 것도 좋습니다. 아이오다이드나 포타시움도 도움이 됩니다. 그 전에 반드시 노란색과 녹색의 아크로포라의 상태도 확인해 보세요.

spsholic Reef Article sps coloration