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
SUPPORT-UNIVERSAL
If you saw a Board, as shown in the picture, you get four blanks to build universal support for any rack — for example, the hanger or Christmas tree. Assembly can be done with nails or screws.
ONE, TWO OR THREE?
In the construction of houses large rooms usually equipped with a harness that allows you to turn the lamps (for example, shesterikova) in series two, four and six lamps. At the same...
