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
LIGHT “TAIGA-2”
Brutal cold, snow storms and drifts, sometimes for many weeks terminated the transport connection between towns in the far North. Even a helicopter in this weather is not up in the air....
“BREAKING” MALOGRUZOVAJA
Like many readers of the journal "modelist-Konstruktor", fond of design — so more than the others interest me in the magazine sections of the "Social Bureau" and "Small-scale...
