Heaters · Adjustable, electronic

Aqueon Pro 100

Aqueon rates it for tanks up to 40 gallons; its manual gives 15 to 40.

100 W fully submersible adjustable heater with an electronic thermostat.

Consider: A cold room can demand more heat than the gallon rating suggests. Compare your coolest room temperature and target water temperature with the manufacturer’s sizing chart.

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US version, item 100532084. Check what’s in the box before you buy.

Rated for a 20 gal tankDrawn to scale on a 20 gallon long (example). 10.5 in long, drawn upright against the back glass; check the maker’s minimum water level and mounting.

Tank size Aqueon rates it for

15 to 40 US gal

Choose your tank to see where it falls.

Check it against your tank →

Specifications that affect fit

Manufacturer capacity
15–40 US gal
Power
100 W
Supply voltage
Not published
Dimensions
1.5 × 1.75 × 10.5 in (L × W × H)

To see what it costs to run, enter the watts on its label and your daily hours in the electricity cost calculator.

Before choosing this model

  • Use Aqueon’s wattage chart for the required temperature rise.
  • Verify actual temperature with a separate thermometer.

What Aqueon doesn’t publish

  • Aqueon doesn’t publish the voltage. Check the label on the box matches your US outlet before you buy.

Our buying guides size it for these tanks:

20 gallon29 gallon40 gallon

A heater rated for your tank can still fall short in a cold room: see how to size one.

Check it against your tank → Something not working? See the troubleshooting guide.

Included items & upkeep

  • heater
  • suction cups

Plan for the routine work

  • Unplug and cool before removal.
  • Keep both suction cups secure and circulation unobstructed.

To budget for replacement media and supplies, use the first-year cost calculator. For how often and how to clean it, follow the maker’s manual.

Manufacturer instructions

Compared with