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
Lieutenant Columbo’s faithful partner
The Peugeot 403 has a lot in common with the GAZ-21 “Volga”. They are roughly the same class and appeared at about the same time. For both Peugeot and the Gorky Automobile Plant, this was...
SIBERIAN FLY SWATTER
Each warm season from spring to autumn throughout recorded history of human existence it bugged various harmful insects, and the stronger the closer to nature it is. And the most common...
