If you decide to have a Cool Water Aquarium, you
won't need an Aquarium Heater or a Thermometer.
here read more about Cool Water Aquariums.
if you choose to have a Warm Water Aquarium, you'll
need both an Aquarium Heater and a Thermometer.
here to read more about Warm Water Aquariums.
come in different sizes that are measured in watts.
Multiply the number of gallons in your aquarium
by 5 to determine the size heater to get for your
example, a ten gallon aquarium needs a 10 x 5 =
50 watt heater. Similarly a 20-gallon aquarium needs
a 20 x 5
= 100 watt heater. Click
here for help on calculating the size of your
read the directions that come in the box with your
aquarium heater, where you'll read about how to adjust
the heater, so your aquarium water is in the correct
here for more information about adjusting your
heater to the correct temperature range.
remove a hot aquarium heater from an aquarium. It
may overheat and crack, or crack when it goes back
into the water. Unplug the heater 15 minutes before
removing it from the aquarium and be sure to plug
it back in, after it's back in the aquarium.