24 
BELDT'S AQUARIUM, ST. LOUIS, MISSOURI 
GUARANTEED ELECTRIC 
AQUARIUM HEATERS 
No. 1. Automatic with pilot light indicator has 
a double socket and two heaters can be used thermo¬ 
statically for two different aquariums if desired. Also 
two heaters can be used in one aquarium, that is if 
the aquarium has a capacity of 50 gallons or more, 
two heaters would be necessary to heat it efficiently 
if the very large aquariums are kept in cold rooms. 
Each heater will heat aquariums from 10 to 45 gal¬ 
lon capacity. This emersion heater is constructed 
with a special chromalox element. The element is 
guaranteed for one year. No. 1 outfit furnished com¬ 
plete with one heater as illustrated. 
Price $5.75 
Additional heaters, each 2.75 
No. 2. Automatic for tanks from 5 to 30 gallons. 
Price each $4.00 
No. 5. These heaters come in single watt for 
following size Aquarium. Don’t forget to state gal¬ 
lon capacity of your aquarium or wattage desired. We can 
supply them as follows: for 2 to 4-gallon tanks, 10-watt; 4 to 
5-gallon tanks, 20-watt; 6 to 9-gallon tanks, 30-watt; 9 to 15- 
gallon tanks, 40-watt; 16 to 25-gallon tanks, 60-watt; 25 to 
35-gallon tanks, 80-watt. 
Any of these priced at $1.00 
No. 1 Heater No. 2 Heater No. 5 Heater 
Price $5.75 Price $4.00 Price $1.00 
The heating elements in No. 2 and No. 5 heaters can be 
replaced when burned out. Price of additional elements, 
each 50c. Installation of elements very simple. Element in No. 
1 heater guaranteed for one year. 
ALL OF THESE AUTOMATIC HEATERS ARE FITTED WITH CONDENSER TO PREVENT 
RADIO INTERFERENCE. 
SUBMERGED 
AQUARIUM REFLECTOR 
This reflector is made to hang on 
the inside in the aquarium. It is 
five inches long and one inch in 
diameter. Besides light, it also pro¬ 
duces a little heat which makes it 
very practical for tropical aquar¬ 
iums. Supplied complete with bulb, 
rubber hanger and rubber extension 
cord. 
Price each 
6 for 
$1.00 
4.50 
GLASS TUBE HEATER 
These Glass Tube Heaters are 
supplied with waterproof tops, 
rubber suction hangers, and com¬ 
plete with plug and 6-foot ex¬ 
tension cords. 
6-inch heaters can be supplied 
in following wattages: 10-watt, 
20-watt, 30-watt, 40-watt. 
Price complete, each $0.85 
8-inch glass tube heaters can be 
supplied in 40-watt, 60-watt, 80- 
watt. Complete as illustrated. 
Each $0.95 
THE "WATCHMAN” 
AUTOMATIC GLASS TUBE 
HEATER No. 6 
This automatic heater is de¬ 
signed for aquariums from 4 to 20 
gallon capacity. The thermostat 
is set to maintain a temperature of 
76° F. However an adjustment is 
possible by turning the small set 
screw on the back plate. A frac¬ 
tion turn to the right increases the 
temperature. 
Price each $2.00 
3 for . . . . 5.60 
No. 6 
JUST A WORD ABOUT TESTIMONIALS YOU SEE 
IN THIS CATALOG 
We positively guarantee that each and every testimonial in this 
catalog is unsolicited and comes from customers who have bought from 
us and are otherwise unknown to us, except that they have written after 
receiving our goods simply because they were satisfied. Original copies 
of these testimonials are kept on file and may be seen at any time by 
anyone wishing to be convinced that they are genuine. We have 
never paid or ever listed in our catalogs a paid for testimonial. 
Do not compare this new type 
glass tube heater to the old sand 
filled type. The glass tubes are 
strong and can stand 800° F. 
without breaking. The special 
michrome element is entirely enclosed in copper which is rust 
resisting and a quick conductor of heat, giving this low priced 
heater all of the quality of a higher priced article. 
