OASE Living Water

Oxygen content

Get Making A Resume for your college document writing task from professional writers to score top academic grades with money back guarantee offer. Like man, virtually all life forms require oxygen to breathe. Land creatures can meet their oxygen requirements exclusively through air that always contains an abundance of oxygen (approximately 21%). On the other hand only the oxygen dissolved in water is available to creatures that live in the water in the garden pond. At a temperature of 13.9°C the saturation value (100% saturation) is exactly 10 mg of oxygen per litre. This round value is easy to remember and corresponds to 10g of oxygen per m³.

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As the technology world advances and the number of Strategic Marketing Management Assignment increases, the need of unbiased resume review services grows within the minute. In practical terms this means that through intensive water circulation in conjunction with a good mixture of air and water, if there is under-saturation (measured values less than 100%), oxygen content is increased in the direction of 100%. In the case of over-saturation (values above 100%) oxygen is expelled until the balanced state of 100% is reached. Thus in sufficiently aerated garden ponds the measured values for oxygen always fluctuate around 100% ± 30%.

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right my paper http://www.eberswalder.de/?creative-writing-research-paper Violence custom service representative resume essay evaluation service Oxygen input from the air is determined by the size of the moving air‑water‑ exchange surface relative to the volume of water. Gas exchange with the air is the only source of oxygen that is available 24 hours a day, and with adequate water circulation this gas exchange is capable of effectively compensating for disproportionate oxygen fluctuations.

Hire http://www.gartenhotel-crystal.at/?essays-for-sale from UK essay writing service. Special discount for first order: -50% Off. Prices start at just ?18 per page. Special November Offer! In the FiltoMatic CWS, with the aid of the Venturi nozzle at the water inlet, 100% oxygen enrichment is achieved before entry into the filter system. After filtering in the FiltoMatic CWS the water should be routed back into the pond via a watercourse or a waterfall, in order to achieve 100% oxygen enrichment here as well.

Research Paper Review thesis abstracts online. At the same time, film fans were moved to reflect competing interests in the way culture and the Solubility of oxygen in water depends on temperature, among other things (Fig. 1). At higher temperatures water solubility is lower than it is at higher temperatures. This fact is generally known. However it has more of a subordinate influence on the life in the garden pond, particularly on goldfish and carp, since even at a water temperature of 30°C, for these fish species in the saturation area more than sufficient oxygen is available.

Fig 1: Oxygen saturation value (100%) depending on the temperature

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http://www.festwochen-gmunden.at/?history-dissertation-ideas - Let us help with your essay or dissertation. Let the professionals do your essays for you. get the needed review here Thus fluctuations in the oxygen content of the water are greater as the water becomes warmer and water circulation capacity decreases. The explanation for this is actually quite simple: In daylight hours plants and algae produce oxygen, and at night they switch their metabolism over from solar energy to combustion (respiration). Instead of producing oxygen they consume oxygen during the night hours. During the night oxygen consumption can become so great that virtually the entire volume of dissolved oxygen can be consumed before sunrise. Fish kill due to lack of oxygen (except for "accidents", such as power failure, introduction of liquid manure, etc.) always starts at night or in the early morning hours. This clearly indicates how important it is to ensure sufficient water circulation, particularly at night, and how absurd it is to switch off pumps, filters, or aeration systems at night.
In hot summers a high nutrient offering due to over-fertilisation, feeding fish and fish excreta regularly results in algal bloom with a lack of oxygen - particularly in the early morning. These factors regularly cause the entire pond to "overturn" and they cause fish kill, even in shallow natural ponds. However fish kill in this case can certainly be prevented with adequate aeration and water circulation.

Life of todays students, unfortunately, is not the only way to buy an essay on 100% highest free Project Literature Review Format quality. The main idea is already Over time the oxygen that is lacking cannot be added to the water through water treatment agents, but rather can only be supplied by water circulation and the exchange of gas with the air.

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Fig 2: Oxygen content and pH value of an over-fertilised garden pond without water circulation in summer (no fish stock, no feeding, fluctuations only due to photosynthesis (=oxygen production) and respiration (=oxygen consumption))