How many watts do you need? Never fear, you'll find the answer in these easy steps.

Difficulty Level: easy      Time Required: 10 minutes

1. Determine the average temperature of the room your tank is in.
2. Determine the temperature you need to keep the water at. This will be based on the kind of fish you keep.
3. Subtract the average room temperature from the temperature you need to maintain the aquarium water at.
4. Use the Heater Guide link under Related Features to determine the wattage you need.
5. If the wattage is borderline, choose the next higher size.
6. If you can afford it, choose heaters that have a real temperature scale on them. They are easier to adjust.
7. Run the heater in your aquarium for at least 24 hrs before adding fish, so you are sure it is working properly.
   

1. Watch for sales and purchase a spare heater for emergencies.
2. Be sure to buy a thermometer when you select your heater.
   

Related Features:

• Heater Guide
• Getting Started - Part 2: Selecting a Lid, Light, and Heater