Fluval 4
Fluval 4 for sale on Ireland's largest auction and classifieds sites
Fluval mini u3 u4 - 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 replacement parts - fluval, - £199.99
Parts suitable fluval • Fx4 fx5 fx6 • Lid fastener a20214 - Free postage - New and Used
Parts suitable fluval • Fx4 fx5 fx6 • Lid fastener a20214 - Free postage - New and Used
Fluval 107 207 - 307, 407 - £159.99
High performance canister • New fluval external • Filter fx4 bridges - Free postage - New and Used
High performance canister • New fluval external • Filter fx4 bridges - Free postage - New and Used
Compatible filter media for - compatible, - £6.49
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
Looking for more fluval 4?
Search eBay live — fresh results filtered for the best value, updated every hour.
Fluval fx4 used months old - used, (12 - £167.10
This prestine condition • Filter has been • Used only months - Free postage - New and Used
This prestine condition • Filter has been • Used only months - Free postage - New and Used
📊
48 listings · from £3.99 · avg £62.52
⚠️ These listings were last updated more than 14 days ago.
Search for fresh listings
Browse 48 fluval 4 listings currently in our index. Prices range from £3.99 to £305.99, with an average of £62.52. 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 4 →
Fluval spare parts - parts, genuine - £13.45
Canister filter fluval • Motor head maintenance • Ribbed hosing this - Free postage - New and Used
Canister filter fluval • Motor head maintenance • Ribbed hosing this - Free postage - New and Used
Fluval mini u3 u4 - fluval, u3, - £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 plus internal - plus, filter - £21.50
Fluval plus internal • Filter tanks 120cm • Condition used dispatched - Free postage - New and Used
Fluval plus internal • Filter tanks 120cm • Condition used dispatched - Free postage - New and Used
Fluval filter media 6 - fluval, u2 - £18.99
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
Fluval underwater aquarium - fluval, - £31.90
Fluval underwater aquarium • Fish tank was • Purchased 2024 however - Free postage - New and Used
Fluval underwater aquarium • Fish tank was • Purchased 2024 however - Free postage - New and Used
170g compatible biomax for - compatible, - £28.99
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 new series - fluval, u-series - £64.99
- Free postage - New and Used
- Free postage - New and Used
Fluval plus compatible - 4, - £5.49
Fluval plus compatible • Foam pads 185mm - Free postage - New and Used
Fluval plus compatible • Foam pads 185mm - Free postage - New and Used
Fluval internal filter - fluval, u4 - £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 foam filter - x, - £14.99
Fluval fx4 fx5 • You are purchasing • Finest filters compatible - Free postage - New and Used
Fluval fx4 fx5 • You are purchasing • Finest filters compatible - Free postage - New and Used
Compatible fluval clean - fluval, - £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
Fluval external filter 107 - external, 207 - £305.99
Fluval external canister • Filters are engineered • Optimal balance performance - Free postage - New and Used
Fluval external canister • Filters are engineered • Optimal balance performance - Free postage - New and Used
Fluval external filter 107 - , - £224.99
Fluval fx6 external • Filter building success • Series has had - Free postage - New and Used
Fluval fx6 external • Filter building success • Series has had - Free postage - New and Used
Fluval reef nano led light - led, - £99.99
Fluval sea marine • Nano led 3.0 • 25w reef aquarium - Free postage - New and Used
Fluval sea marine • Nano led 3.0 • 25w reef aquarium - Free postage - New and Used
Fluval filter shrimp - filter, - £14.99
Essential upgrade anyone • Keeping shrimp their • Aquarium fish effectively - Free postage - New and Used
Essential upgrade anyone • Keeping shrimp their • Aquarium fish effectively - Free postage - New and Used
Compatible filter media for - compatible, - £35.99
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
Fluval fx4 fx5 - fx4, canister - £16.00
Unbreakable steel fastener • Barrel nut assembly • Use fluval fx4 - Free postage - New and Used
Unbreakable steel fastener • Barrel nut assembly • Use fluval fx4 - Free postage - New and Used
Fluval led plant light - 4.0, - £229.99
Fluval plant 4.0 • Led 59w 110 • 22w such have - Free postage - New and Used
Fluval plant 4.0 • Led 59w 110 • 22w such have - Free postage - New and Used
Compatible fluval u4 - x, - £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 spec flex - fluval, & - £5.99
Research grade carbon • Has large amounts • Surface area adsorption - Free postage - New and Used
Research grade carbon • Has large amounts • Surface area adsorption - Free postage - New and Used
Compatible foam filter - x, - £4.49
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
Orange fluval fx4 - orange, - £5.44
Set orange fasteners • Providing you one • Spare back due - Free postage - New and Used
Set orange fasteners • Providing you one • Spare back due - Free postage - New and Used
Fluval betta poly carb - fluval, poly-carb - £9.99
From fluval range • Effective solution maintaining • Consistently clean water - Free postage - New and Used
From fluval range • Effective solution maintaining • Consistently clean water - Free postage - New and Used
Fluval fx4 external canister - fluval, - £247.99
Fx4 bridges gap • Between fluval famous • 406 fx6 external - Free postage - New and Used
Fx4 bridges gap • Between fluval famous • 406 fx6 external - Free postage - New and Used
Compatible fluval - compatible, - £6.99
- Free postage - New and Used
- Free postage - New and Used
Compatible fluval u3 - fluval, - £9.49
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 - compatible, - £6.49
- Free postage - New and Used
- Free postage - New and Used
Compatible poly filter - x, - £5.99
Compatible poly filter • Pads suitable fluval • Fx5 fx6 external - Free postage - New and Used
Compatible poly filter • Pads suitable fluval • Fx5 fx6 external - 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 brackets - fluval, u3 - £6.45
Fluval internal filter • Genuine spare parts • Bracket a15404 one - Free postage - New and Used
Fluval internal filter • Genuine spare parts • Bracket a15404 one - Free postage - New and Used
Fluval foams filter pads - x, - £3.99
Foams suitable models • 204 205 206 • 304 305 306 - Free postage - New and Used
Foams suitable models • 204 205 206 • 304 305 306 - Free postage - New and Used
Fluval ribbed hose hosing fish - ribbed, - £24.99
Fluval ribbed hosing • Such have huge • Wealth experience online - Free postage - New and Used
Fluval ribbed hosing • Such have huge • Wealth experience online - Free postage - New and Used
Fluval spray bar kit - fx, for - £23.39
High performance spray • Bar specifically fluval • Fx2 fx4 fx6 - Free postage - New and Used
High performance spray • Bar specifically fluval • Fx2 fx4 fx6 - Free postage - New and Used
Fluval fx4 canister - fx4, - £209.99
Fluval motor head • Fx4 external filter • Seal gasket 307 - Free postage - New and Used
Fluval motor head • Fx4 external filter • Seal gasket 307 - Free postage - New and Used
Compatible fluval bio foam - bio-foam, max - £6.99
Filter foams • These new style • Bio foam max - Free postage - New and Used
Filter foams • These new style • Bio foam max - Free postage - New and Used
Fluval filter media u3 - fluval, u1 - £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 fx4 filter service kit - fx4, - £114.75
Fluval fx4 • Motor sealing ring • Fx2 impeller spare - Free postage - New and Used
Fluval fx4 • Motor sealing ring • Fx2 impeller spare - Free postage - New and Used
Fluval fx4 canister - fx4, filter - £199.99
Fluval motor head • Fx4 external filter • Seal gasket 307 - Free postage - New and Used
Fluval motor head • Fx4 external filter • Seal gasket 307 - Free postage - New and Used
Fluval fx4 motor - fx4, - £114.75
Fluval fx4 motor • Unit includes sealing • Ring such have - Free postage - New and Used
Fluval fx4 motor • Unit includes sealing • Ring such have - Free postage - New and Used
Fluval spec stage a1377 - fluval, - £7.45
Research grade carbon • Has large amounts • Surface area adsorption - Free postage - New and Used
Research grade carbon • Has large amounts • Surface area adsorption - Free postage - New and Used
Fluval bio fix - bio, biological - £28.99
Best results rinse • Monthly using aquarium • Water replace partially - Free postage - New and Used
Best results rinse • Monthly using aquarium • Water replace partially - Free postage - New and Used
Compatible pre filter - pre, - £4.49
You are purchasing • Finest filters compatible • Pre filter foams - Free postage - New and Used
You are purchasing • Finest filters compatible • Pre filter foams - Free postage - New and Used
Compatible fluval 65g biomax - fluval, - £14.99
Very high surface • Area this product • Allows rapid colonisation - Free postage - New and Used
Very high surface • Area this product • Allows rapid colonisation - Free postage - New and Used
Try this: marina fish tanks | marine protein skimmer | aquatic plants | dennerle | nitrate filter | montipora | aquarium wood | fluval u4 filter | aquael | tropical snails
Shop by budget
Everything you need to know about fluval 4
Whether you are looking for a brand-new or second-hand fluval 4, 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 £3.99, while premium listings can reach £305.99 — giving you a wide budget spread to work with. The average price of £62.52 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.