Filters · Canister
Fluval 307
Manufacturer-rated for 40–70 US gal aquariums.
Mid-size external filter with distinct pump-output and in-system circulation ratings.
Consider: A cabinet that fits the body can still leave too little hose or service room. Measure the full route and removal space before choosing this larger canister.
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US version, item A446. Check what’s in the box before you buy.
Tank size Fluval rates it for
40 to 70 US gal
Choose your tank to see where it falls.
Check it against your tank →Specifications that affect fit
- Manufacturer capacity
- 40–70 US gal
- Power
- 16 W
- Supply voltage
- 120 V / 60 Hz
- Dimensions
- 9.5 × 7 × 16.5 in (L × W × H)
- Pump output
- 303 GPH
- Filter circulation
- 206 GPH
- Maximum flow
- Not published
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
- Measure cabinet height, door opening, and hose route.
- Use the circulation figure for like-for-like flow comparisons.
Our buying guides size it for these tanks:
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
- ribbed hosing
- intake assembly
- output nozzle
- media baskets
Plan for the routine work
- Unplug and close the AquaStop valves before opening.
- Follow the manual for seal and impeller care.
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.
07 Series service checks
Unplug the filter and follow the steps in the manual linked below before you open it.
- Reduced flow
- Inspect and clean the intake strainer, hoses, impeller and impeller well as directed in manual page EN-3. Debris buildup can restrict the water path.
- No flow after servicing
- Check the AquaStop locking and opening sequence on EN-9. If the hose vacuum was lost, follow the manual’s priming procedure.
- Seal deterioration or leakage
- Follow the motor-head gasket inspection and replacement instructions. Use only the specified silicone lubricant; an improvised seal repair is not a substitute.
- Noise or a fault that won’t clear
- Contact Fluval support with the model number and what you see. Don’t run a damaged filter or open the motor.