Fluval M100 vs Aqueon Pro 100

What changes for you, from the makers' published figures. Neither is "better": the right one is the one that fits your tank and how you look after it.

For a 20 gallon long (example)

Both fit by the makers’ ratings.

  • Fluval M100: Rated for a 20 gal tank.
  • Aqueon Pro 100: Rated for a 20 gal tank.

What changes for you

  • Tank size: the Fluval M100 is rated up to 30 US gal, the Aqueon Pro 100 15–40 US gal.
  • Size: Fluval M100 11 in long, Aqueon Pro 100 10.5 in long. Check it fits your tank’s water depth at the angle you mount it.
  • Type: Fluval M100 is an adjustable submersible model, Aqueon Pro 100 an adjustable, electronic model, so installation and cleaning differ.

Next: Fluval M100: details and fit · Aqueon Pro 100: details and fit · All heaters for your tank

Fluval M100

Aqueon Pro 100

Both drawn at one scale on a 20 gallon long (example), from the makers’ published dimensions; positions are approximate.

As an Amazon Associate I earn from qualifying purchases.

Fluval M100

Manufacturer-rated for aquariums up to 30 US gal.

Drawing of an aquarium heater (not a photo of the Fluval M100)

Aqueon Pro 100

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

Side by side

Fluval M100 vs Aqueon Pro 100: published specifications
Published figureFluval M100Aqueon Pro 100
Rated tank sizeUp to 30 US gal15–40 US gal
Power100 W100 W
Dimensions11 × 1 × 1 in (L × W × H)1.5 × 1.75 × 10.5 in (L × W × H)
In the boxheater, mounting bracket, suction cupsheater, suction cups

Figures as published by each maker; see each model’s page for its sources. Open this pair in the full comparison tool →

Related comparisons