THERMOSTATS 
A thermostat will not heat the water. A 
thermostat is an electrically controlled 
automatic switch that will turn the 
aquarium heater on or off at whatever 
temperature it is set for, thus maintain- 
ing a constant water temperature. When 
shipped all thermostats are set for 74° 
F. All are adjustable and come with di- 
rections tor regulating. Thermostats are 
economical in that they save electricity, 
they operate only when the water tem- 
perature drops below desired setting. 
A single thermostat will control several 
heaters -if the aquariums are exposed 
to approximately the same room 
temperature. 
All Thermostats are fully guaranteed for one year 
by manufacturer. 
No. 1. RENOYLENE THERMOSTAT—Easily ad- 
justed. Due to the unique construction, snap ac- 
tion shut off is obtained, thereby reducing all 
objectionable radio interference to a minimum. 
Will accommodate several heaters up to 250 
watts. Six foot rubber lead cord with 3 way con- 
nection and monel-metal clip holder. 8 inch tube. 
each $3.00 
(Pilot lights, if desired, 35c extra) 
No. 2 SIMPLEX THERMOSTAT—Built-in radio in- 
terference eliminator. Will accommodate several 
heaters up to combined wattage of 300 watts. 
4¥2 foot cord with 3 way connection for pilot 
light and additional heaters; inside adjustment, 
aluminum clip holder. 8 inch tube. each $3.25 
(Pilot light, if desired, 35c extra) 
THERMOSTATIC HEATER 
A thermostatically con- 
trolled heater in a low 
price range for those 
aquarists who wish auto- 
matic heat control in one 
tank only. Thermostat and 
heater are held to side of 
aquarium by a clear lucite 
holder; no parts to -cor- 
rode. Elements are labor- 
atory tested for efficient 
econen'cal operation. 
40 watts $3.85 
75 watts $3.95 


No. 3. DUPLEX THERMOSTAT—Designed for 
safety. Two separate thermostat units so arranged 
that either unit will shut off heaters. One unit is 
set for 75° F, if it fails to turn off heaters the 
other unit will shut off at 80° r. (Both units are 
adjustable.) Built in radio condenser to eliminate 
static, 3 way plug, 4¥2 foot lead cord, will accom- 
modate combined heaters up to 300 watts. 8 inch 
tube. each $6.00 
(Pilot light, if desired, 35c extra) 
No. 4. OUTSIDE ADJUSTMENT THERMOSTAT— 
Knob on top permits easy outside adjustment. 
Will accommodate several heaters up to 500 watts. 
Built in static eliminator, 3 way plug, 4¥2 foot 
lead cord, aluminum clip holder. 8 inch: tube. 
each $4.95 
(Pilot light, if desired, 35c extra) 
No. 5. PILOT LIGHT—Bulb and plug in socket to 
plug in thermostat connection. When heater is on 
the light is on, goes off when thermostat shuts off 
heater; makes thermostat adjustment simple, an 
indicator to show when heater is on. each 35c 
No. 6. PILOT LIGHT—Long lasting neon-activated 
light. Complete unit only 1% inches. Plugs into 
thermostat connection. each 35c 
ALL THERMOSTATS ARE FULLY GUARANTEED 
No. 7. LUCITE CLAMP—To replace worn or brok- 
en heater and thermostat clamps. Designed to fit 
any standard heater or thermostat tube on any 
standard aquarium frame. each 40c 
No. 8. METAL CLAMP—Made of guaranteed non- 
corrosive metal to fit standard tubes, may be bent 
to fit any aquarium frame. each 25¢ 
No. 9. Pyrex Tubes—To replace broken thermostat 
or heater tubes. These tubes come in 6, 8 and 10 
inch lengths to fit most heaters and thermostats. 
1”’x10”—85e; 1”x8”—25e; 394’’x6”—20c 
No. 10. HEATER SEALING COMPOUND—1 oz. 
can to seal at least two heaters. Easy to use and 
any that is left may be kept indefinitely for future 
use. 15c per can 
No. 11. HEATING ELEMENTS—To replace worn 
heating units made in 5 sizes, 10, 20, 30, 40, and 
50 watts. Ready to attach to cord. each 35c 
