Filters · Hang-on-back

Fluval AC30

Manufacturer-rated for 10–30 US gal aquariums.

Four-stage hang-on-back filter with adjustable flow, a reusable media basket, and maker-rated maximum flow.

Consider: The media basket lifts upward. Leave unobstructed space above the filter so routine cleaning does not require moving the tank.

US version, item 19600. Check what’s in the box before you buy.

Rated for a 20 gal tankDrawn to scale on a 20 gallon long (example). Body 4.4 in deep and 6.4 in tall, hung on the back rim; check the gap behind the tank and the lid cut-out.
Drawing of an aquarium filter (not a photo of the Fluval AC30)

Tank size Fluval rates it for

10 to 30 US gal

Choose your tank to see where it falls.

Check it against your tank →

Specifications that affect fit

Manufacturer capacity
10–30 US gal
Power
7 W
Supply voltage
120 V / 60 Hz
Dimensions
6.1 × 4.4 × 6.4 in (L × W × H)
Pump output
Not published
Filter circulation
Not published
Maximum flow
150 GPH

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

Pump output, filter circulation and maximum flow are measured in different ways. Your filter will move less water than the box says once media and hoses are in. Measure it with the flow calculator.

Before choosing this model

  • Confirm item 19600 and the AC30 size.
  • Measure rear and overhead clearance before buying.
  • The manual lists a maximum aquarium rim thickness of 0.9 inches / 2.4 cm. Measure your tank rim before buying.

Our buying guides size it for these tanks:

10 gallon20 gallon29 gallonBetta tankShrimp tank

A filter rated for your tank can still be too tall for your cabinet or too strong for small fish: see how to choose one.

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

Choose and care for mechanical, biological and chemical media before buying replacement supplies.

Included items & upkeep

  • Bio-Foam
  • carbon
  • BIOMAX
  • intake sponge

Plan for the routine work

  • Unplug before service.
  • Follow the AC manual for media order, basket service, and impeller cleaning.

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