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Fluval U3

Finest Filters stock a complete range of compatible foam and polycarbon filter cartridges to fit the Fluval U3 Filter. We are also pleased to now offer our own compatible biomax for efficient biological filtration in your Fluval U3 filter. We offer bundle sets of our filter media which offer the best value compared to buying parts individually. Our foam pads, polycarbon filter cartridges and biomax are made to the same specification as the original brand filters.

Filters

£
£

12 x Compatible Fluval U3 Polycarbon Filter Cartridges

£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49
In stock

You are buying a pack of 12 compatible polycarbon filter cartridges to fit the Fluval U3 internal filter. These filter cartridges have a polyester...

View full details
£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49

4 x Compatible Foam and 4 x Polycarbon Carbon Filter Cartridges and 170g Biomax for Fluval U3

£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49
In stock

Set of 4 x compatible foam, 4 x compatible polycarbon and 170g compatible biomax suitable for the Fluval U3 internal filter. The plain filter spong...

View full details
£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49

4 x Fluval U3 Compatible Plain Foam and 4 x Compatible Polycarbon Filter Cartridges

£0.00 - £0.00
£0.00
£9.49
£9.49 - £9.49
£9.49
In stock

You are buying a set of 4 compatible plain filter foams and 4 x compatible polycarbon filter cartridges to fit the Fluval U3 internal filter. The ...

View full details
£0.00 - £0.00
£0.00
£9.49
£9.49 - £9.49
£9.49

170g Compatible Biomax For Fluval U2 U3 U4 Internal Filters Ceramic Filter Media

£0.00 - £0.00
£0.00
£5.99
£5.99 - £5.99
£5.99
In stock

Finest Filters Biomax is made to the same specification as the Fluval original Biomax.This product is packed in 170g bags.This product is compatibl...

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£0.00 - £0.00
£0.00
£5.99
£5.99 - £5.99
£5.99

8 x Fluval U3 Compatible Plain Foam and 8 x Compatible Polycarbon Filter Cartridges

£0.00 - £0.00
£0.00
£17.49
£17.49 - £17.49
£17.49
In stock

You are buying a set of 8 compatible plain filter foams and 8 x compatible polycarbon filter cartridges to fit the Fluval U3 internal filter. The ...

View full details
£0.00 - £0.00
£0.00
£17.49
£17.49 - £17.49
£17.49

12 x Fluval U3 Compatible Plain Foam and 12 x Compatible Polycarbon Filter Cartridges

£0.00 - £0.00
£0.00
£23.49
£23.49 - £23.49
£23.49
In stock

You are buying a set of 12 compatible plain filter foams and 12 x compatible polycarbon filter cartridges to fit the Fluval U3 internal filter. Th...

View full details
£0.00 - £0.00
£0.00
£23.49
£23.49 - £23.49
£23.49

4 x Compatible Fluval U3 Polycarbon Filter Cartridges

£0.00 - £0.00
£0.00
£6.49
£6.49 - £6.49
£6.49
In stock

You are buying a pack of 4 compatible polycarbon filter cartridges to fit the Fluval U3 internal filter. These filter cartridges have a polyester ...

View full details
£0.00 - £0.00
£0.00
£6.49
£6.49 - £6.49
£6.49

4 x Compatible Fluval U3 Foams

£0.00 - £0.00
£0.00
£5.49
£5.49 - £5.49
£5.49
In stock

You are buying a pack of 4 compatible filter foam pads to fit the Fluval U3 internal filter.These pads are made from exactly the same material as t...

View full details
£0.00 - £0.00
£0.00
£5.49
£5.49 - £5.49
£5.49

8 x Compatible Fluval U3 Polycarbon Filter Cartridges

£0.00 - £0.00
£0.00
£9.99
£9.99 - £9.99
£9.99
In stock

You are buying a pack of 8 compatible polycarbon filter cartridges to fit the Fluval U3 internal filter. These filter cartridges have a polyester ...

View full details
£0.00 - £0.00
£0.00
£9.99
£9.99 - £9.99
£9.99

12 x Compatible Fluval U3 Foams

£0.00 - £0.00
£0.00
£12.49
£12.49 - £12.49
£12.49
In stock

You are buying a pack of 12 compatible filter foam pads to fit the Fluval U3 internal filter.These pads are made from exactly the same material as ...

View full details
£0.00 - £0.00
£0.00
£12.49
£12.49 - £12.49
£12.49

Compatible Fluval Clean & Clear Cartridges (8 Pack)

£0.00 - £0.00
£0.00
£16.99
£16.99 - £16.99
£16.99
In stock

Compatible Fluval Clean & Clear U1 U2 U3 U4 Filter Media Cartridges (8 Pack)  The compatible Fluval clean and clear cartridge brings crystal cl...

View full details
£0.00 - £0.00
£0.00
£16.99
£16.99 - £16.99
£16.99

8 x Compatible Fluval U3 Foams

£0.00 - £0.00
£0.00
£8.99
£8.99 - £8.99
£8.99
In stock

You are buying a pack of 8 compatible filter foam pads to fit the Fluval U3 internal filter.These pads are made from exactly the same material as t...

View full details
£0.00 - £0.00
£0.00
£8.99
£8.99 - £8.99
£8.99

8 x Compatible Foam and 8 x Polycarbon Carbon Filter Cartridges and 2 x 170g Biomax for Fluval U3

£0.00 - £0.00
£0.00
£23.99
£23.99 - £23.99
£23.99
In stock

Set of 8 x compatible foam, 8 x compatible polycarbon and 2 x 170g compatible biomax suitable for the Fluval U3 internal filter. The plain filter s...

View full details
£0.00 - £0.00
£0.00
£23.99
£23.99 - £23.99
£23.99

Compatible Fluval Clean & Clear Cartridges (4 Pack)

£0.00 - £0.00
£0.00
£8.99
£8.99 - £8.99
£8.99
In stock

Compatible Fluval Clean & Clear U1 U2 U3 U4 Filter Media Cartridges (4 Pack)  The compatible Fluval clean and clear cartridge brings crystal cl...

View full details
£0.00 - £0.00
£0.00
£8.99
£8.99 - £8.99
£8.99

12 x Compatible Foam and 12 x Polycarbon Carbon Filter Cartridges and 3 x 170g Biomax for Fluval U3

£0.00 - £0.00
£0.00
£32.99
£32.99 - £32.99
£32.99
In stock

Set of 12 x compatible foam, 12 x compatible polycarbon and 3 x 170g compatible biomax suitable for the Fluval U3 internal filter. The plain filter...

View full details
£0.00 - £0.00
£0.00
£32.99
£32.99 - £32.99
£32.99

12 x Compatible Fluval U3 PolyMax Filter Cartridges

£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49

4 x Fluval U3 Compatible Plain Foam and 4 x Compatible PolyMax Filter Cartridges

£0.00 - £0.00
£0.00
£9.49
£9.49 - £9.49
£9.49
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£9.49
£9.49 - £9.49
£9.49

12 x Fluval U3 Compatible Plain Foam and 12 x Compatible PolyMax Filter Cartridges

£0.00 - £0.00
£0.00
£23.49
£23.49 - £23.49
£23.49
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£23.49
£23.49 - £23.49
£23.49

8 x Compatible Fluval U3 PolyMax Filter Cartridges

£0.00 - £0.00
£0.00
£9.99
£9.99 - £9.99
£9.99
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£9.99
£9.99 - £9.99
£9.99

8 x Fluval U3 Compatible Plain Foam and 8 x Compatible PolyMax Filter Cartridges

£0.00 - £0.00
£0.00
£17.49
£17.49 - £17.49
£17.49
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£17.49
£17.49 - £17.49
£17.49

Compatible Fluval Clean & Clear Cartridges (2 Pack)

£0.00 - £0.00
£0.00
£4.99
£4.99 - £4.99
£4.99
In stock

Compatible Fluval Clean & Clear U1 U2 U3 U4 Filter Media Cartridges (2 Pack)  The compatible Fluval clean and clear cartridge brings crystal cl...

View full details
£0.00 - £0.00
£0.00
£4.99
£4.99 - £4.99
£4.99

4 x Compatible Foam and 4 x Polymax Filter Cartridges and 170g Biomax for Fluval U3

£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£13.49
£13.49 - £13.49
£13.49

8 x Compatible Foam and 8 x Polymax Filter Cartridges and 2 x 170g Biomax for Fluval U3

£0.00 - £0.00
£0.00
£23.99
£23.99 - £23.99
£23.99
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£23.99
£23.99 - £23.99
£23.99

4 x Compatible Fluval U3 PolyMax Filter Cartridges

£0.00 - £0.00
£0.00
£6.49
£6.49 - £6.49
£6.49
In stock

Compatible Fluval U3 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium Filter You are purchasing Finest Filters Compatible PolyMa...

View full details
£0.00 - £0.00
£0.00
£6.49
£6.49 - £6.49
£6.49