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
GRANDMA’S MOUSETRAP
In fact, this device rodents literally no catches, but oceti effectively brings forth the Secret is not in a design that is extremely simple and in folk wisdom, take one feature in the...
GAS SOLDERING IRON
In the practice of the rally often faced with the necessity of soldering or welding. A few years ago I accidentally saw used for this purpose, benzopyrene production of the GDR, then had...
