We carried out the experiment, the essence of which is as follows:
We went to the nearest market in Moscow (in this case – Timiryazevskaya) and bought ice cream salmon and cream Astrakhan sturgeon. After that we went to a supermarket “Ramstor” and bought a live carp and sturgeon, picked up their live catfish, better fed. All the samples deposited in Test Center Food Products, Food Raw materials, Feedstuffs, Soil, Agrochemicals and Water GCAS “Moscow”. The test results are shown below.
A similar experiment you can do in the city, such tests can make public health services (SES). Note that in a private firm with a license it may be cheaper.
Tests 1 fish Tests fish Tests 1 fish 2 fish 2 Tests
Note: to read a description of the pictures, click on the picture and read the text at the bottom.
What conclusions can be drawn. Continue reading
How to make a pond in the country is asked to tell many gardeners: some people like to make decoration of your garden, others dream to fish in your pond fish. For anyone who would like to have a pond on the plot, we offer to get acquainted with how to make a pond at the cottage .
Simple decorative pond with a depth of 50-60 cm can be done anywhere on the site. For its construction does not require expensive materials, it helps to stock up on clay or sand, gravel, felt paper or polymer film.
How to make a pond in the country — 1 method
First, dig a pit of the required size and shape with sloping soffits. At the bottom of the stack of well-crushed clay layer 10-15 cm, then smooth down with water and allow to dry, then stack the second layer of clay 10-15 cm, mounted on a small gravel or pebbles and tamped.
How to make a pond in the country — 2 way
Another method of construction of the reservoir — with the use of waterproofing, which can be made from tar paper or polymer film. Their spread in several layers on the sand (10 cm) on top and sprinkled fine gravel (10-12 cm). Currently on the market there are various types of plastic films: polyvinyl chloride (PVC film),polypropylene, polyethylene and other polymers. Continue reading