BELDT’S 



AQUARIUM 
SAINT LOUIS, MO. 


THERMOSTATIC CONTROLS 
AND 
AIR RELEASERS 

Condenser Plug 
Each $75e, postpaid 
For the elimination of Radio 

aS 
S 
S 

Schickerling Ultra Violet 
Lamps 
These new patented Ultra Vio- 
let Lamps will operate on 110 
volts A. C. or D. C. currents. 
Tropical fish and plants can be 
kept without sunlight in good 
growing condition and healthy. 
If you are unable to keep your 
fish in a southern or eastern ex- 
Watchman Thermostats 
These automatic heat regula- 
tors will maintain a range of 
proper temperatures for tropical 
aquariums and are set for about 
75° EF. All are fitted with pure 
silver contact points. All of 
these thermostats are fitted with 
hangers and water-proof exten- 
sion cords. 
No. 1 
500-watt capacity, complete 
with outside control knob, will 
not interfere with radios. Has 
three-way plug attachment so 
that three heaters may be hooked 

to this one regulator. Size of 
glass tube, 8x1 inches. 
Pree rece ae Ge ee eee ee ee $3.75 
No. 2 
400-watt capacity with inside 
regulator, also has three-way 
plug attachment so that three 
heaters may be used with this 
regulator. The glass tube has an 
overall length of 8 inches. 
Pricecre: 2a ee $2.50 
No. 3 
100-watt thermostat is  de- 


interference, to be used with any 
type of thermostat you now have. Desuier ais 
need. 
they are indispensable. 


Tubular Type 
25-watt, 
40-watt, 5% in. long 
60-watt, 11% in. long 
Note 
When adjusting these thermo- 
stats, a fraction turn to the right 
increases the temperature and to 
the left lowers the temperature. 

Sea Foam Air Releasers 
Each 
No. 1—1% in. round airstone........... Se ee ee ee $1.75 
NO see e——Leltl) FO UNG AILS CON Cacacee see er ta nee Peete Pe ena ieee 1.50 
NOjp. o—loin. SQUATEC alrstomes-= cee ee eee eases 1.55 
No. 4—1% in. diam. by 1% in. cone shape........-...........-..... 1.75 
Nos. 1, 2, 3 and 4 airstones are mounted on chromium 
plated fittings. The. chromium plated brass tubing has a 
040x3/16 in. wall and an overall length of 16 inches. 
No. 5—Ornamental diver with air release in helmet, an at- 
tractive novelty. 
No. 6—Airstone with fitting for rubber tubing. 
No. 7—Needle valve for adjusting airflow in each outlet, 
also has tee for continued line. 
No. S—Tee pieces for branch connections. 
DOZEN ts Losec $2.50 
nection. +~Hache......------- $0.40 DOZENt cee seers: $4.00 
No. 10—White rubber tubing; 2 ft. for 15e; 5 ft. for 30e; 
10 ft. for 55e; over 10 ft., 5e per ft. 
No. 10-A—Best grade black rubber tubing. 
8 ft...........$0.15 BO Ueistecmresnet $2.25 100 ft...........$4.00 
No. 11—U channel black rubber for fastening to the ends of 
glass partitions, will fit glass from single window 
thickness up to 3/16 in. plate glass. With the aid 
of these U channel partitions may be made tight 
without danger of breakage. 2 
Prices pen (LO Ot ecsses. ee eee 0-2 -ease eee Cae eae a eee fan Se $0.10 
is just what you 
For the winter months 
Bibgu ais el ONS eres ee 

signed for two heater units for 
aquariums up to 30-gallon ca- 
pacity; the heat regulator is on 
the inside; the glass tube is 6 
inchesMon2g Prices .a- $1.80 
A special condenser is built in 
these thermostats to prevent ra- 
dio interference. 
All thermostats 
plugs as illustrated. 
have 3-way 

NO. 1 THERMOSTAT 
Watchman Thermostats 
These thermostats only regu- 
late the temperature and can be 
used with any non thermostatic 
controlled heater. 




SEAFOAM AIR RELEASERS 
