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
AND HAMMER — EASY
Even firmly planted on the wooden handle of a hammer eventually relaxes from the shock and shrinkage of wood. Again to strengthen it will help the screw, screwed in the center cross,...
KANGAROO – BACKPACK FOR BABY
Lovers of travel and tourism would like to take your small child. But kids can't walk: because when an adult makes a single step, they take three and get tired quickly. However, if the...
