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
ZIL-111
Moscow car factory ZIS your Executive cars started to produce in 1936. The first such car was the limousine ZIS-101 created by the design team under the direction of E. Vazhinsky...
Automatic bee feeder and waterer
When I leased three apiaries with the right to buy them out, I realized how difficult it is to maintain a large number of bee colonies. I solved some of the problems with a feeder-drinker,...
