Microcosm of the reservoir and especially his life

Microcosm of the reservoir and especially his life

In natural waters reigns biological balance. Different plants, fish and the organisms dependent on each other, forming a so-called food web. Any external influence on individual members of this community certainly affects all living organisms of this ecosystem.
Natural ecosystems are able to restore the disturbed balance. But man-made, such as, for example, garden ponds, sometimes completely unable to cope sotoyanii even with small failures in the system.
Most of the problems in the garden pond is due to the large number of fish that people are, as usual, the food is “to dump”, in which chezultate pond receives an excessive amount of fertilizer.
Garden ponds are usually small, so the selection of fish can not be decomposed without help from the outside for a long time. Man forced to interfere and artificially administered adjuvants.
Excessive fertilizer, which experts called eutrophication, results in the fact that the algae start to bloom, and the water becomes murky green, as in literally overshadows the joy of the owner of a garden pond.
At night algae and plants consume oxygen and release carbon dioxide into the water. After a few weeks the algae die and sink to the bottom, where they begin to decompose .
This process consumes all the oxygen produced by algae. Its content in water decreases rapidly, so fish and other aquatic organisms suffocate. At this point, a garden pond is in a state from which it can not get out on their own.
To the fish do not die. water artificially enriched with oxygen by circulation or fountain installations, sometimes add dry oxygen
However, such a supply of oxygen helps prevent only the death of the fish, while the unwanted clouding and coloring pond green remain unchanged.
Obviously, the oxygenated water is vital for all the inhabitants of the garden pond. Its content in the water depends on many factors: the length of daylight, temperature, air pressure and the water surface area in the reservoir.
At higher temperatures, such as, for example, oxygen is less soluble in water. Meanwhile, it is in the heat of living creatures need more oxygen. Generally known: an increase in temperature of 10 0 C oxygen demand doubles. In summer, the population of the pond is particularly acute suffering from hypoxia.
In general, the oxygen balance of garden pond is subject to strong fluctuations. So during the night oxygen consumption can be so high that before the sun is consumed the entire stock. This threatens the survival of fish and the rest breathing organism, especially in the morning.
So it is strongly not recommended to turn off the ventilation system at night.
Means for the care of water can compensate for oxygen deficiency only for a short period of time. Per cubic content of the pond to compensate for the oxygen deficiency is necessary daily from 5 to more than 15 g of pure oxygen.
Another important factor for all living creatures in the water – acidity (pH). They are able to survive if this value fluctuations are negligible.
PH represents the concentration of acid or alkali and can have a value from 0 to 14.
Optimal for a variety of life in the garden pond are pH of 6 to 8.5. If the values ​​are outside this range may occur in fish skin and gills of the disease, possibly fatal.
For a healthy climate it is also extremely important to maintain the balance of carbon dioxide. At its lack water pH increases strongly with an excess, on the contrary, decreases.

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