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****文章来自于http://saltwateraquariumhobby.com/saltwater-aquarium-cycling/nitrogen-cycle/
Before we start filling our new aquarium with saltwater and live rock, we first we need to understand the saltwater aquarium cycle, sometimes referred to as the Nitrogen Cycle.
在我们开始往鱼缸里面加盐水和活石的适合,我们首先需要知道盐水鱼缸的周期,确切的说是氮的转换周期。
Understanding the nitrogen cycle will give us an insight into the natural processes that take place within a healthy aquarium.
只有理解了氮的转换周期,我们就可以明白,需要经历这个自然的过程,我的鱼缸才可以变成一个健康的鱼缸。
nitrogen cycle
氮转换周期
The Nitrogen Cycle keeps this aquarium thriving
这个周期可以让鱼缸充满活力。
Hopefully, it will also drive home the importance of the Nitrogen Cycle, and how it is absolutely vital that both Time and Nature are allowed to run their natural course before we start adding our new marine inhabitants.
So What Is The Nitrogen Cycle?
在理解了氨循环的重要性之后,我们才能明白,自然规律是需要时间和自然的方式,当然,在我们往鱼缸里面加入生物之前需要掌握自然的规律,是至关重要的。
Marine fish drink the water in their environment constantly and excrete small amounts of very concentrated urine constantly. Combine this concentrated urine with fecal pellets, multiply that by several fish and throw in a good measure of uneaten, decomposing food into the equation, and we get ammonia.
海洋鱼类不停的在他们的生活环境中摄取水分,当然也会不停的分泌一定数量的浓缩尿液。这些浓缩尿液与他们的便便混合在一起,加上没有吃完的或者未分解的食物,于是,我们的鱼缸就有了氨。
Even 1 ppm (part per million) of ammonia is deadly to fish and corals. 甚至一百万分之一的氨,都会让鱼和珊瑚死掉。
In order for marine fish and corals to survive and thrive in our enclosed aquarium environment, we need to develop and cultivate a healthy population of beneficial bacteria that will neutralize the ammonia. Breaking down ammonia is necessary for the nitrogen cycle to begin.
为了让海洋鱼类和珊瑚,在封闭的鱼缸环境中生活并且快乐成长,我们需要发展并且培养一定数量的健康的有益菌,这些有益菌将会消化氨。氨的分解是氮循环的第一步。
Once allowed to multiply, these bacteria will populate the hard substrate in the tank, including the live rock, sandbed, tank walls and even the surfaces of powerheads and pumps. If it’s underwater, these bacteria will colonize it.
一旦这个有益菌得到繁殖,他们就会释放一些酶作用物到鱼缸中,包括活石,活沙,鱼缸的墙壁,甚至造浪仪的表面,或泵。他们会在水下不停的繁殖着。
The first group of nitrifying bacteria — the aerobic, oxygen-loving Nitrosomonas — break down the ammonia produced by fish waste into nitrite (No2). Nitrite, while not as lethal as ammonia, is still poisonous to aquatic life.
The second group of oxygen-loving bacteria, Nitrobacter, consume the nitrite and convert it to nitrate (No3). Nitrate is far less harmful to fish and is easily tolerated unless it reaches very high concentrations of 200 ppm or more.
所产生的第一批硝化菌(好氧性亚消化单胞菌)可以将鱼产生的氨分解成亚硝酸盐。尽管亚硝酸盐不像氨有那么强烈地致命性,但是对于鱼缸来说,他仍然是有毒的。
But unlike fish, corals do not tolerate nitrate well. It is recommended that not more than 5ppm of nitrate be present in an aquarium stocked with small-polyped stony corals (SPS), with 20ppm being the upper threshold for large-polyped stony corals (LPS).
和鱼类不一样,珊瑚基本上很难忍受亚硝酸盐。专家建议,在SPS鱼缸中,亚硝酸盐不可以超过百万分之五,在LPS鱼缸中,不可以超过百万分之二十。
If the ammonia in our aquariums were to endlessly convert to nitrate, and if the nitrogen cycle were to stop there, we would soon have a nitrate factory, on our hands.
Not so good.
如果氨在我们的鱼缸中无止境的转换成硝酸盐,如果氮循环将所有的氨,亚硝酸盐全部全换成硝酸盐,并且没有新的氨和亚硝酸盐产生,那么,我们即将就可以建造一个硝酸盐的“工厂”,即使这样,还是不够的。
And this is where denitrifying bacteria come to the rescue. This genera of anaerobic bacteria live within the pores of live rock and deep within the sandbed where oxygen is poor. Denitrifying bacteria reduce nitrate to harmless nitrogen gas which escapes from the aquarium water in the form of gas bubbles, in effect completing the nitrogen cycle.
这样一来,一些反硝化细菌又会过来营救。而那些普通厌氧菌就会生活在氧气缺乏的活石小孔里,和活沙底层。反硝化细菌将会把硝化菌转变为无毒的氮气,以小气泡的形式从鱼缸中释放出来,这样才算完成了一个氮循环。
The nitrogen cycle is Nature’s perfect solution for maintaining a healthy saltwater aquarium!
Which finally brings us to…
The Nitrogen Cycle And How To Properly Cycle Your Saltwater Aquarium
If you’ve read this far, Congratulations.
这就是怎样合理的去循环你的盐水鱼缸,如果你读到了这里,恭喜你,走出了第一步。
It is likely that you will also be patient enough when it comes time to sit through your saltwater aquarium cycle. By now you will have come to realise that the nitrogen cycle is all about the bacteria.
When we cycle a brand new aquarium, all we are doing is giving the different species of bacteria enough time to establish themselves. The aim is to have a large, diverse population of bacteria so that they will be able to complete the nitrogen cycle through all its stages, from ammonia to nitrite and nitrate, and finally, to nitrogen gas.
所以,我们必须要有足够的耐心,让鱼缸来完成这个循环。至此,我们应当明白,氮循环,其实就是一个菌的过程。
Starting the Nitrogen Cycle
开始氮循环
Now for the bad news. it will take a minimum of 4 weeks to cycle your tank and to establish the nitrogen cycle. And that is only if you are using fully cured live rock.
坏消息是,这将会需要至少4周的时间去循环并且建立氮循环。前提是,这些是已经处理过的活石!!!
I usually shoot for a full 6 weeks of cycling when using semi-cured live rock. But in any case, more weeks is always better.
如果是干的活石,我通常认为,需要至少6周的时间,当然,多几周的适应期,总是最好的。
And now for more bad news — no livestock should be in your tank during the cycling process. No fish, corals, shrimp.. nothing.
And please do not use live fish to cycle your saltwater aquarium! Fishless aquarium cycling is not only humane, but is just as effective.
I started my very first saltwater aquarium in 2005 and cycled it with two yellow-tail damsels. A bad idea. The conventional wisdom at the time, supported with some very bad advice from my local fish shop, was to use a hardy fish or two to start the nitrogen cycle and see it through to completion. If they survived. One of my yellow-tail damsels died within a day. The other damsel, Bluey, I am happy to report is very much alive, plump and happy today, in November 2011.
还有一个坏消息是,在这个周期里面,不能放入任何的生物!!!,不能有鱼,珊瑚,虾,什么都不可以有!!!
也请不要用鱼来循环你的海水鱼缸,没有鱼的循环鱼缸,不仅仅是因为人道主义,更因为那样才是最有效的。
我曾在2005,用两条黄尾雀鲷来开始循环我的盐水鱼缸。非常糟糕的主义。这个在当时被公认为传统的开缸建议是我当地的鱼店给我的,他们认为用一条或者两条好养活的鱼来开始氮循环,来观察开缸的效果。结果,一条黄尾在第一天就死掉了,幸运的是,另外一条到目前为止,(2011年11月)仍然快乐的生活着。
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