Koi filter
Koi filter for sale on Ireland's largest auction and classifieds sites
Auto cleaning pressurised - cleaning, - £749.99
Lastly exiting water • Steriliser capable reducing • Harmful bacteria algae - Free postage - New and Used
Lastly exiting water • Steriliser capable reducing • Harmful bacteria algae - Free postage - New and Used
Pressurised koi pond filter - pressurised, uv - £649.99
Lastly exiting water • Steriliser capable reducing • Harmful bacteria algae - Free postage - New and Used
Lastly exiting water • Steriliser capable reducing • Harmful bacteria algae - Free postage - New and Used
Pond moving bed filter - pond, media - £11.99
This process which • Removes harmful ammonia • Nitrite from water - Free postage - New and Used
This process which • Removes harmful ammonia • Nitrite from water - Free postage - New and Used
Pond dechlorinator water - dechlorinator, - £23.00
Pond water • Essential maintaining healthy • Fish beneficial bacteria - Free postage - New and Used
Pond water • Essential maintaining healthy • Fish beneficial bacteria - Free postage - New and Used
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Bakki shower trickle sieve - bakki, shower/trickle/sieve - £170.21
Handmade pre production • Sieve shower features • 1.5 inlet multi - Free postage - New and Used
Handmade pre production • Sieve shower features • 1.5 inlet multi - Free postage - New and Used
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48 listings · from £7.99 · avg £159.38
Browse 48 koi filter listings currently in our index. Prices range from £7.99 to £749.99, with an average of £159.38. 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 koi filter →
Cbf range pond filter foams - cbf, - £8.49
Yellow fine grade • Foam blue coarse - Free postage - New and Used
Yellow fine grade • Foam blue coarse - Free postage - New and Used
Aquarium pond filter - pond, wool - £8.99
Finest filters are • Leading supplier high • Quality 100 aquarium - Free postage - New and Used
Finest filters are • Leading supplier high • Quality 100 aquarium - Free postage - New and Used
Kockney koi black box filter - kockney, - £60.99
Their fuss design • Makes installation simple • They have been - Free postage - New and Used
Their fuss design • Makes installation simple • They have been - Free postage - New and Used
Bakki shower trickle filter - bakki, - £185.00
Bakki shower attempts • Simulate natures way • Filtering water similar - Free postage - New and Used
Bakki shower attempts • Simulate natures way • Filtering water similar - Free postage - New and Used
Pressurised pond filter - pressurised, - £7.99
Yellow fine grade • Foam - Free postage - New and Used
Yellow fine grade • Foam - Free postage - New and Used
Complete koi fish box - complete, - £274.99
Bay filter system • Kit includes pump • Steriliser hose cbf - Free postage - New and Used
Bay filter system • Kit includes pump • Steriliser hose cbf - Free postage - New and Used
Koi pond filter media plastic - filter, - £599.99
Protect perfect your • Pond tank aquarium • Aqua sure premium - Free postage - New and Used
Protect perfect your • Pond tank aquarium • Aqua sure premium - Free postage - New and Used
Evolution aqua eazypod filter - evolution, - £499.95
How eazypod works • Water from pond • Via inlet then - Free postage - New and Used
How eazypod works • Water from pond • Via inlet then - Free postage - New and Used
Lotus green genie - uv, filter - £279.99
Lotus green genie • Pond filter box • Ultimate solution maintaining - Free postage - New and Used
Lotus green genie • Pond filter box • Ultimate solution maintaining - Free postage - New and Used
Japanese matting jap mat - mat, pond - £59.99
These sheets can • Easily cut down • Fit most models - Free postage - New and Used
These sheets can • Easily cut down • Fit most models - Free postage - New and Used
Blow air pump - hi, aqua - £139.95
Ltr super low • Power consumption watts • At38 dba 120 - Free postage - New and Used
Ltr super low • Power consumption watts • At38 dba 120 - Free postage - New and Used
Filter floss wool - floss, foam - £8.39
Aquarium pond filter • Wool works basis • Electrostatic attraction debris - Free postage - New and Used
Aquarium pond filter • Wool works basis • Electrostatic attraction debris - Free postage - New and Used
Pond filter media - pond, fine - £18.95
Filter foam wadding • Thickness increased performance • 2.75 thick option - Free postage - New and Used
Filter foam wadding • Thickness increased performance • 2.75 thick option - Free postage - New and Used
Evolution aqua detox - aqua, - £124.95
Evolution aqua detox • Dechlorinator carbon line • All fishkeepers know - Free postage - New and Used
Evolution aqua detox • Dechlorinator carbon line • All fishkeepers know - Free postage - New and Used
Pond koi filter - filter, cell - £69.99
All one pond • Pump sterilizer foams • Solutions cup 129 - Free postage - New and Used
All one pond • Pump sterilizer foams • Solutions cup 129 - Free postage - New and Used
Set kockney koi - set, - £9.99
Grade filter foam • Aquarium pond sponge • Can cut needed - Free postage - New and Used
Grade filter foam • Aquarium pond sponge • Can cut needed - Free postage - New and Used
Pressurised pond filter - pressurised, - £8.99
- Free postage - New and Used
- Free postage - New and Used
Pond filter brushes - filter, - £25.99
These filters brushes • Are very effective • Trapping debris without - Free postage - New and Used
These filters brushes • Are very effective • Trapping debris without - Free postage - New and Used
Labs pond mature live - nt, - £9.90
Live filter bacteria • Mature includes key • Including nitrosomonas spp - Free postage - New and Used
Live filter bacteria • Mature includes key • Including nitrosomonas spp - Free postage - New and Used
Pond aquarium uv light - aquarium, - £129.99
Allpondsolutions light steriliser • Range have unique • Design which feeds - Free postage - New and Used
Allpondsolutions light steriliser • Range have unique • Design which feeds - Free postage - New and Used
Bermuda pond skimmer - bermuda, lph - £59.60
Its compact automatic • Skimming action make • Easy use straight - Free postage - New and Used
Its compact automatic • Skimming action make • Easy use straight - Free postage - New and Used
Evolution aqua pure sludge - aqua, - £14.95
What pure sludge • Build can cause • Imbalances pond ecosystem - Free postage - New and Used
What pure sludge • Build can cause • Imbalances pond ecosystem - Free postage - New and Used
Fish mate bio - mate, g-bio - £36.49
Pond 1250 5000 • Litres 250 1000 • Gal fish mate - Free postage - New and Used
Pond 1250 5000 • Litres 250 1000 • Gal fish mate - Free postage - New and Used
Alfagrog koi pond filter media - alfagrog, - £125.50
Alfagrog filter media • Sacks 14kg used • Cleaned condition collection - Free postage - New and Used
Alfagrog filter media • Sacks 14kg used • Cleaned condition collection - Free postage - New and Used
Swell pond filter - filter, kit - £260.99
Pond filter will • Water produce clear • Creating healthy wildlife - Free postage - New and Used
Pond filter will • Water produce clear • Creating healthy wildlife - Free postage - New and Used
Aps koi fish - aps, triple - £274.99
Filter foams • After matting water • Will flow through - Free postage - New and Used
Filter foams • After matting water • Will flow through - Free postage - New and Used
Pond filter - pond, - £465.70
Veggie bog filter • These filters don • Only look good - Free postage - New and Used
Veggie bog filter • These filters don • Only look good - Free postage - New and Used
Bermuda pond skimmer 3000 - bermuda, - £59.49
Left float around • This could include • Things like leaves - Free postage - New and Used
Left float around • This could include • Things like leaves - Free postage - New and Used
Fish mate pbio - pbio, 15000l - £103.95
Keeping your pond • 15000 pbio pressurised • Filter here keep - Free postage - New and Used
Keeping your pond • 15000 pbio pressurised • Filter here keep - Free postage - New and Used
Kockney koi pond filter mat - kockney, - £8.95
Pond filter mat • Wadding from kockney • Koi has been - Free postage - New and Used
Pond filter mat • Wadding from kockney • Koi has been - Free postage - New and Used
Bermuda pond pressure filter - bermuda, - £146.32
Bermuda pressure filter • 000 pond products • Water can pumped - Free postage - New and Used
Bermuda pressure filter • 000 pond products • Water can pumped - Free postage - New and Used
Fish mate pressurised - pressurised, filter - £186.99
Puv fish mate • Pressurised bio filter • 5000 10000 15000 - Free postage - New and Used
Puv fish mate • Pressurised bio filter • 5000 10000 15000 - Free postage - New and Used
Jebao pond filter - uv, koi - £79.95
Jebao pressurised pond • Filter built watt • Ultra violet clarifier - Free postage - New and Used
Jebao pressurised pond • Filter built watt • Ultra violet clarifier - Free postage - New and Used
Koi pond large vortex - koi, - £175.00
Genuine valterra slide • Gate valves koi • Fish pond filter - Free postage - New and Used
Genuine valterra slide • Gate valves koi • Fish pond filter - Free postage - New and Used
Evolution aqua eazypod - evolution, - £499.95
Eazypod filter tidy • Compact very footprint • Workswater from pond - Free postage - New and Used
Eazypod filter tidy • Compact very footprint • Workswater from pond - Free postage - New and Used
Kockney koi mega black - koi, box - £78.95
Fuss design makes • Installation simple they • Have been enable - Free postage - New and Used
Fuss design makes • Installation simple they • Have been enable - Free postage - New and Used
Stage hma high flow water - stage, - £56.04
Koi pond dechlorinator • Chlorine removal aquafilter • Chlorinators are used - Free postage - New and Used
Koi pond dechlorinator • Chlorine removal aquafilter • Chlorinators are used - Free postage - New and Used
Koi pond water - water, for - £20.90
Pond water • Essential maintaining healthy • Fish beneficial bacteria - Free postage - New and Used
Pond water • Essential maintaining healthy • Fish beneficial bacteria - Free postage - New and Used
Koi fish ponds - 2x, - £11.95
Chlorine pesticides comparison • Other carbon filters • Sintered block has - Free postage - New and Used
Chlorine pesticides comparison • Other carbon filters • Sintered block has - Free postage - New and Used
Allpondsolutions 6000l koi - allpondsolutions, - £89.99
This single bay • Filter system has • Two blue coarse - Free postage - New and Used
This single bay • Filter system has • Two blue coarse - Free postage - New and Used
Evolution aqua pond surge - aqua, - £304.95
Evolution aqua surge • Filter optional pond • Along varipump 10000 - Free postage - New and Used
Evolution aqua surge • Filter optional pond • Along varipump 10000 - Free postage - New and Used
Lotus oasis clearpond - lotus, 25 - £279.99
Creates clean clear • Healthy pond back • Flush simple way - Free postage - New and Used
Creates clean clear • Healthy pond back • Flush simple way - Free postage - New and Used
Pressurised koi pond filter - pond, - £169.99
Allpondsolutions range pressurised • Pond filters built • Clarifiers are continuously - Free postage - New and Used
Allpondsolutions range pressurised • Pond filters built • Clarifiers are continuously - Free postage - New and Used
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Everything you need to know about koi filter
Whether you are looking for a brand-new or second-hand koi 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 £7.99, while premium listings can reach £749.99 — giving you a wide budget spread to work with. The average price of £159.38 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.