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
WINCH: PLOWMAN, KARCZEWSKI AND… MINESWEEPER
"Harnessed... the winch" — under this title was published in the "Modeller-designer" № 8, 1995, the material on the system that I designed of selectresponse. Not the last role in it...
BERRIES LIKE STUFFING
I read once in a magazine advice to skip the berries for canning sugar through a meat grinder. Tried: I have not — clogged the outlets after the first three or four tablespoons of...
