"CHASE" CHROME AQUARIUM HEATER 
"Chase’’ heaters are made of the best materials and are 
built to withstand the abuse ordinarily given an electric 
heater when used in an aquarium. 
The shell is made of chromium plated brass tubing and 
cannot be broken by a sudden change of temperature or 
by being dropped. 
The "Chase" heater is designed to lay on the bottom of 
the aquarium where the heat really belongs. The design 
is such as to afford the best possible circulation of the 
heated water, and is also easily concealed among the 
aquarium plants so that it will not mar the beauty of the 
aquarium. 
These heaters are guaranteed for two years from date of 
purchase against defective workmanship or material. 
Heaters may be had in the following wattages: 
20, 40, 60 Watts . $2.00 Each 
75, 100, 150 Watts . $2.25 ” 
Caution: Do not turn on current until heater is submer¬ 
ged in water. 
HOW TO DETERMINE CORRECT WATTAGE 
OF HEATER 
To figure the approximate wattage for a given size 
aquarium, multiply the number of gallons by 3 watts. 
For example, a 5 gallon tank will take a 15 W heater. 
This gives a temperature of about 12 degree above the 
atmospheric temperature. This rule applies where the 
heater is not controlled by a thermostat. 
When using a thermostat, multiply the number of gallons 
by 6 watts, (using a 30 W heater for 5 gallons) which 
will give you a 25 degree rise above the room tempera¬ 
ture. 
The above temperatures are not guaranteed as it is im¬ 
possible to allow for many elements that tend to cause 
a variation of a degree or two. 
