Fluval u4 filter
Fluval u4 filter for sale on Ireland's largest auction and classifieds sites
Compatible filter media for - filter, - £26.49
Will supplied foam • Polycarbon set 170g • Ordering sets biomax - Free postage - New and Used
Will supplied foam • Polycarbon set 170g • Ordering sets biomax - Free postage - New and Used
Fluval mini u3 - fluval, mini,u1,u2,u3,u4 - £73.49
Fluval internal filter • Provides efficient filtration • Create superior aquarium - Free postage - New and Used
Fluval internal filter • Provides efficient filtration • Create superior aquarium - Free postage - New and Used
Fluval internal filter - internal, - £65.99
Upgrade your aquarium • Filtration fluval internal • Filter tanks 240 - Free postage - New and Used
Upgrade your aquarium • Filtration fluval internal • Filter tanks 240 - Free postage - New and Used
Compatible fluval - compatible, u4 - £6.99
- Free postage - New and Used
- Free postage - New and Used
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Compatible filter media for - compatible, - £32.99
Effectively filters phosphate • Produce crystal clear • Water reduces odours - Free postage - New and Used
Effectively filters phosphate • Produce crystal clear • Water reduces odours - Free postage - New and Used
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48 listings · from £4.45 · avg £28.31
⚠️ These listings were last updated more than 9 days ago.
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Browse 48 fluval u4 filter listings currently in our index. Prices range from £4.45 to £73.52, with an average of £28.31. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about fluval u4 filter →
Fluval new series - new, u-series - £64.99
- Free postage - New and Used
- Free postage - New and Used
Fluval filter media 6 - fluval, u4 - £20.99
Fluval polishing pad • External filter foam • 107 407 fx4 - Free postage - New and Used
Fluval polishing pad • External filter foam • 107 407 fx4 - Free postage - New and Used
170g compatible biomax for - compatible, - £40.99
This product compatible • Fluval filter very • High surface area - Free postage - New and Used
This product compatible • Fluval filter very • High surface area - Free postage - New and Used
Fluval mini u3 u4 - u2,, u3, - £23.95
Fluval series filters • Provide option setting • Flow output different - Free postage - New and Used
Fluval series filters • Provide option setting • Flow output different - Free postage - New and Used
Fluval underwater internal - fluval, - £47.50
Used internal fishtank • Filter month - Free postage - New and Used
Used internal fishtank • Filter month - Free postage - New and Used
Fluval mini u3 u4 - fluval, mini,u1,u2,u3,u4 - £21.99
Aquarium capacity • 130 240 suitable • Aquariums from 150 - Free postage - New and Used
Aquarium capacity • 130 240 suitable • Aquariums from 150 - Free postage - New and Used
Compatible fluval u4 foam - 4, - £10.49
Nylon filter sock • 200 micron long • Aquarium marine finest - Free postage - New and Used
Nylon filter sock • 200 micron long • Aquarium marine finest - Free postage - New and Used
Fluval series internal - series, - £45.99
Mini fluval underwater • Filter provides efficient • Filtration create superior - Free postage - New and Used
Mini fluval underwater • Filter provides efficient • Filtration create superior - Free postage - New and Used
Compatible fluval clean - compatible, - £9.99
Compatible range filters • Compact all aquariums • Crystal clear results - Free postage - New and Used
Compatible range filters • Compact all aquariums • Crystal clear results - Free postage - New and Used
Spray bar for - u1, u3 - £16.64
Fits fluval series • Internal filters this • Can result reduced - Free postage - New and Used
Fits fluval series • Internal filters this • Can result reduced - Free postage - New and Used
Compatible fluval clean - compatible, - £5.49
Compatible range filters • Compact all aquariums • Crystal clear results - Free postage - New and Used
Compatible range filters • Compact all aquariums • Crystal clear results - Free postage - New and Used
Fluval poly carbon filter - fluval, - £7.25
Custom sized fits • Perfectly inside filter • Chamber prevent debris - Free postage - New and Used
Custom sized fits • Perfectly inside filter • Chamber prevent debris - Free postage - New and Used
Fluval underwater internal - fluval, u4 - £61.01
New other fluval • Underwater internal aquarium • Fish tank power - Free postage - New and Used
New other fluval • Underwater internal aquarium • Fish tank power - Free postage - New and Used
Fluval filter media value - media, - £19.45
Such have huge • Wealth experience online • Trading present list - Free postage - New and Used
Such have huge • Wealth experience online • Trading present list - Free postage - New and Used
Fluval u4 filter - u1, u3 - £20.50
Fluval foam pads • Box contents a488 • Underwater filters a487 - Free postage - New and Used
Fluval foam pads • Box contents a488 • Underwater filters a487 - Free postage - New and Used
Fluval filter media u3 - u1, u2 - £7.95
Effectively produces crystal • Clear water reduces • Odors creates ideal - Free postage - New and Used
Effectively produces crystal • Clear water reduces • Odors creates ideal - Free postage - New and Used
Fluval filter media - fluval, - £8.80
Also fits fluval • Underwater filters effectively • Produces crystal clear - Free postage - New and Used
Also fits fluval • Underwater filters effectively • Produces crystal clear - Free postage - New and Used
Compatible fluval clean - fluval, & - £18.99
Compatible range filters • Compact all aquariums • Crystal clear results - Free postage - New and Used
Compatible range filters • Compact all aquariums • Crystal clear results - Free postage - New and Used
Compatible with fluval - compatible, u4 - £23.99
They will fit • Internal power filteronly • These are not - Free postage - New and Used
They will fit • Internal power filteronly • These are not - Free postage - New and Used
Fluval filter media foam - fluval, - £20.99
Fluval foam pads • Series underwater filter • Biomax 110g such - Free postage - New and Used
Fluval foam pads • Series underwater filter • Biomax 110g such - Free postage - New and Used
Compatible fluval u4 foam - 4, - £13.99
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Compatible fluval u4 - fluval, - £19.49
Nylon filter sock • 200 micron long • Aquarium marine finest - Free postage - New and Used
Nylon filter sock • 200 micron long • Aquarium marine finest - Free postage - New and Used
Compatible fluval u4 - 4, - £10.49
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Fluval internal aquarium - fluval, - £73.49
Position vertically against • Aquarium wall create • Currents customized flow - Free postage - New and Used
Position vertically against • Aquarium wall create • Currents customized flow - Free postage - New and Used
Fluval mini u3 u4 - mini, u1 - £45.99
Fluval series filters • Provide option setting • Flow output different - Free postage - New and Used
Fluval series filters • Provide option setting • Flow output different - Free postage - New and Used
Fluval new series - fluval, - £60.49
Fluval internal filter • 1000l aquariums 240l • 600l - Free postage - New and Used
Fluval internal filter • 1000l aquariums 240l • 600l - Free postage - New and Used
Fluval filter internal - fluval, - £60.49
Option setting flow • Output different positions • Provides maximum circulation - Free postage - New and Used
Option setting flow • Output different positions • Provides maximum circulation - Free postage - New and Used
Compatible fluval u4 foam - compatible, - £14.99
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Out front adjustable spray - out, in - £10.00
Will fit all • Fluval series filters • Oxygenator valve through - Free postage - New and Used
Will fit all • Fluval series filters • Oxygenator valve through - Free postage - New and Used
Fluval aquarium internal - fluval, - £4.45
Available mini filters • Genuine fluval internal • Series filter foam - Free postage - New and Used
Available mini filters • Genuine fluval internal • Series filter foam - Free postage - New and Used
Fluval poly carb carbon - fluval, - £21.99
Removes odours harmful • Toxins help create • Crystal clear aquarium - Free postage - New and Used
Removes odours harmful • Toxins help create • Crystal clear aquarium - Free postage - New and Used
Compatible polycarbon - 4, - £6.99
Finest aquatics ltd - Free postage - New and Used
Finest aquatics ltd - Free postage - New and Used
Fluval series u3 u4 - u, - £29.99
Adjustable way flow • Models from fluval • Mini suitable aquariums - Free postage - New and Used
Adjustable way flow • Models from fluval • Mini suitable aquariums - Free postage - New and Used
Compatible polycarbon - 8, - £10.49
Finest aquatics ltd - Free postage - New and Used
Finest aquatics ltd - Free postage - New and Used
Compatible fluval u4 foam - u4, - £26.99
- Free postage - New and Used
- Free postage - New and Used
Fluval underwater aquarium - underwater, - £72.99
Fluval series filters • Provide option setting • Flow output different - Free postage - New and Used
Fluval series filters • Provide option setting • Flow output different - Free postage - New and Used
Fluval new series - fluval, - £73.52
Fluval internal filter • 1000l aquariums 240l • 600l - Free postage - New and Used
Fluval internal filter • 1000l aquariums 240l • 600l - Free postage - New and Used
Compatible polymax - 4, x - £6.99
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Effectively produces crystal • Clear water reduces • Odours creates ideal - Free postage - New and Used
Fluval aquarium internal - aquarium, - £21.75
Fluval impeller a15333 • Such have huge • Wealth experience online - Free postage - New and Used
Fluval impeller a15333 • Such have huge • Wealth experience online - Free postage - New and Used
Fluval filter media - u3, - £19.99
Biomax 55g poly • Carb provides months • Clear healthy aquarium - Free postage - New and Used
Biomax 55g poly • Carb provides months • Clear healthy aquarium - Free postage - New and Used
Fluval poly clearmax - u4, - £7.25
Effectively produces crystal • Clear water reduces • Odors creates ideal - Free postage - New and Used
Effectively produces crystal • Clear water reduces • Odors creates ideal - Free postage - New and Used
Compatible foam filter - compatible, - £5.99
You are purchasing • Finest filters compatible • Foam filter pads - Free postage - New and Used
You are purchasing • Finest filters compatible • Foam filter pads - Free postage - New and Used
Compatible fluval u4 - x, - £35.99
- Free postage - New and Used
- Free postage - New and Used
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Everything you need to know about fluval u4 filter
Whether you are looking for a brand-new or second-hand fluval u4 filter, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £4.45, while premium listings can reach £73.52 — giving you a wide budget spread to work with. The average price of £28.31 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.