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
PRESS THE BIBLIOPHILE
In every family there is not one book, which is read, that is, to the holes. We carefully stored the logs of past years for the sake of one or two written in them of favorite pieces....
CLOTHESPIN ON A BED
Until the seedlings, and it is easy to confuse what is planted in a particular bed. Arrange for your garden or summer cottage here such simple devices — and and plantings and sowings...
