concentration

Corals and fish of the red sea

There are on our planet, the sea of extraordinary beauty, attracting millions of tourists from all over the world for its clear water, beautiful corals and diverse fishes. It comes to the Red sea. This is one of the most beautiful places of our planet.

Why do they call it? No exact answer. Someone thinks that it got its name due to algae that in some months, the sea change colour from azure blue to red. And some prefer a more interesting explanation. According to the Bible, Moses led the Jews from Egypt to Israel through the Red sea. When they approached the shore – the water parted and exposing the bottom. It consisted entirely of canyons, cliffs and hollows. The path was very rugged and a lot of Jews died, bleeding to death. That’s why it was called the Red sea.

The red sea is a Gulf of the Indian ocean. It is situated in the deep depression, formed millions of years ago between the Arabian Peninsula and Africa. An area of almost 500 thousand square kilometers, with more than two thirds of the sea is located in tropical zone. The average water depth from 500 m to 1 km in the middle part of the sea is crack, as if dissecting it into two parts. There is a depth of 2.5 to 3 km. makes it different from other seas of our planetat that the Red sea is not no river flows. The Suez canal in the Northern part of the sea – the work of human hands, it is rather narrow, so the natural circulation of water occurs only in the southern part of the sea through the Bab-El-Mandeb.

This natural isolation has led to the fact that in the Red sea the most clear water. Usually the rivers carry their waters in the sea sand, debris and dirty water. But in this sea water is so clear that you can easily see the incredible beauty and diversity of “underwater life” of the red sea.

The absence of influent rivers has also led to the fact that sea has the most salty water among all seas on our planet. The salt concentration here is that to drown is almost impossible. It is well suited for those who decided to learn to swim and likes to swim far away (fatigue less than in the other seas). Continue reading

The importance of fish in human nutrition

There are some foods that are simultaneously rich in iron, phosphorus, zinc, magnesium, calcium, selenium, vitamins A, E, D, and amino acids that are necessary for the normal functioning of the cardiovascular system, thyroid gland and stomach. But in fish, all these elements abound. Therefore it is very importance of fish in human nutrition. In addition, this product small fat content (30%), it is perfectly assimilated by the human stomach digests the protein contained in fish, only 1.5-2 hours compared to 5 hours it takes to digest, say, beef.

The importance of fish in nutrition

People suffering from excess weight, just perfect river fish, which contains 2.5 grams of fat per 100 grams of weight. But suffering from diabetes can have it without any restrictions, because the number of carbohydrates it is small – only 0.1%.

Fish, competing in this regard with the chicken, is an excellent source of high quality protein which contains all necessary for normal functioning of amino acids. It also differs from meat protein by the presence of methionine.

Due to the fact that the collagen that makes up connective tissue, has the property of rapid transition in a soluble form, fish is easy to cook, and its tissues become loose, blagodaram provides maximum and rapid absorption of all nutrients. The most rich in protein fish include salmon, trout, and salmon, Beluga, easier to say that all representatives of groups of sturgeon and salmon. Great importance in human nutrition fish is also underpinned by a very high nutritional value due to high concentration of fatty acids. It refers to oily marine fish – salmon, mackerel, herring, trout, salmon and other things. Continue reading

What kind of water suitable for the aquarium?

In aquarium practice is usually to use tap or well water, which in its properties is very diverse. Water is oxide of hydrogen (H2O) and consists of two parts hydrogen and one part oxygen. In the water many dissolved substances (oxygen 21%, nitrogen 76%, carbon dioxide of 0.3%). Water in contact with soil, plants, fish, the products of decay and alkaline earth elements, acquires new qualities. The water in the aquarium must be free of any impurity metals must not contain large amounts of salts of magnesium, calcium and any other components that are harmful to aquarium inhabitants.

In rural areas often use wells, river and lake water. Before pouring water in an aquarium must be heated to a temperature of 70 C, thereby partially release water from undesirable microorganisms.

Water, potable, and suitable for the aquarium, of course, if it’s not mineral water. At home to fill in the most suitable aquarium tap water, which in most geographical areas of our country is of medium stiffness with seasonal fluctuations within 8 – 12 ‘. Excessive chlorine in it, you can delete, defending water in non-metallic container for 1 – 2 days (complete disappearance of released bubbles), active aeration (10 -12 hours),filtration through activated carbon, adding to it the hyposulphite (thiosulphate) sodium (1 g/10 l) or by boiling for 10 minutes. The last method, the water loses oxygen and must be aerated.

The use of pond water is not recommended, and the water is rain and snow the city is not suitable for the aquarium, as it contains large amounts of harmful solid, liquid and gaseous state. In rural areas, the use of such water is possible, but it needs to be filtered from dust and other substances. Continue reading

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