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
GRINDS DRILL…
Getting a smooth surface — a long and laborious process. Cut it will help the sanding attachment on a drill, which is a cylinder with an oblique gap, which made the ends of strips of sandpaper.
“ROLL” HAY — STACK
With the growth of livestock per farm farms there was a need of increasing the food supply. Forage - a very laborious process, requiring great effort and fine days weather loosens it a...
