• Genuine Fluval A20111 — the current magnetic impeller for this filter family, not a generic substitute.
• Flat-blade design — matches the fan profile fitted to the 104/204 and 105/205 motor heads from the factory.
• Direct swap — no tools needed beyond opening the motor head lid.
• Supersedes A20110 — the previous part number for this position, now discontinued.

A20111 is built for the smallest two canisters in Fluval's older 04/05 range, not the 06 series that followed them.

This listing's title also names the 106 and 206, but Fluval builds those two motor heads around a different impeller, shaft and rubber bushing set, part A20112. If your filter is a 106 or 206, A20111 will not seat correctly — order the A20112 impeller, shaft and bushing assembly instead.

• 1 x magnetic impeller (A20111)

• Impeller shaft. The ceramic shaft the impeller spins on is a separate part.
• Impeller cover. The clear cap over the impeller well is a different part again.
• Rubber bushing. Fitted only on the 106/206 A20112 assembly, not on this one.

Suitable for a 104, 204, 105 or 205 that has gone quiet, is running weak, or has a visibly chipped or worn impeller. Suitable for freshwater and marine setups.

Not suitable for the 106, 206, or any 07, FX or newer canister — those ranges use different impellers.

Magnetic impellers wear from grit and from running dry. Rinse the impeller at each filter service and check the ceramic shaft for scoring. A motor that hums with no flow is the classic sign the impeller has cracked or the magnet has come loose from the blades — that's an impeller failure, not a motor failure, and this part fixes it without replacing the whole motor head.

• 105 Motor/Pump Unit — if the housing itself is also cracked or the motor hums even with a new impeller fitted
• 105/106 filter case — for a cracked or stress-marked canister body
• Motor head gasket O-ring — cheap insurance against a weep while the head is already open

Supplied as a genuine Fluval replacement part. Your rights under the Australian Consumer Law apply in full and nothing here limits them. No separate manufacturer warranty term is quoted on moulded service parts. Ships as a standard small parcel anywhere in Australia.

Does this fit my Fluval 106?

No. The 106 and 206 use a different impeller, shaft and bushing assembly, part A20112, sold separately. A20111 is built for the 104/204 and 105/205 only.

My old packaging says SP259 or A20110 — is this the right replacement?

Yes. A20111 is the current version of that part, sold under this SKU since Fluval updated the design.

Do I need to replace the shaft at the same time?

Not necessarily, but check it while the motor head is open. A scored or worn shaft will chew through a new impeller quickly, so replace both if the shaft shows grooves.

Will a worn impeller damage the motor?

Running a filter for long periods with a chipped or magnet-loose impeller can strain the motor, so replace it promptly rather than running it down.