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
ELECTRODINAMICA
A delicious and useful product — sauerkraut. Practical housewife, harvest it in the autumn as in the countryside and in the city. And the most time-consuming operation here is to shred...
Lever to help
Sometimes a load lifted by a crane beam or winch (when replacing an engine in a car, for example) needs to be lowered slightly to the side from the suspension point. In this case, an...
