TWO OPTIONS OF HEATERS FOR AQUARIUMS OFFER OUR READERS. Uniform temperature in the aquarium keeps the water-filled Cycling or any other appropriate size camera. It is placed as shown in the figure.
S. KINDLER, Saratov
Heaters that are commercially available — with a filament and salt, or bulky, or too powerful.
“Semiconductor” heater:
1 — wire bracket, 2 — tube, 3 — sand, 4 — tube, 5 — resistor, 6 — power cord with plug.
Within a few minutes you can make a “heating” coal resistors type MLT, VS-2, MT-2, etc. with a capacity of 2 watts. They are inserted into the glass tube, the ends are attached to power cord with plug and close the vial stopper. The power of the heater can be more than 20 watts.
V. BEDNYAGIN, Novocherkassk
Recommend to read
“FRENCH ELECTRIC”
The idea behind the project was never built submarine "Ero" physicist Marie-Davy, to supply its electric motor, it seemed very attractive. Indeed, what could be better than a virtually...
THE MIXER IS NOT FOR THE KITCHEN
The need to effectively mix anything occurs not only in cooking, but, for example, in the preparation of two-component parquet lacquer, complex color paint, or epoxy glue. Thus it is...
