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Aquarium monitor

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Aquarium monitor for sale on largest auction and classifieds sites

Home / / Aquarium monitor refurbished & used for sale | For Sale
V2control digital - v2control, ph

V2control digital - v2control, ph

€104.70
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Seachem alert continuous - seachem, ph

Seachem alert continuous - seachem, ph

€13.99
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Digital inline tds meter - inline,

Digital inline tds meter - inline,

€34.99
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Inline tds meter water - inline,

Inline tds meter water - inline,

€7.99
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Seachem ammonia alert - seachem, stick

Seachem ammonia alert - seachem, stick

€10.85
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Inline tds meter marine - tds, meter,

Inline tds meter marine - tds, meter,

€7.99
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Drop checker aquarium co2 - drop,

Drop checker aquarium co2 - drop,

€3.99
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Inline tds meter marine - inline, meter,

Inline tds meter marine - inline, meter,

€6.99
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Seachem ammonia combo - ammonia,

Seachem ammonia combo - ammonia,

€14.90
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Seachem ammonia alert test kit - ammonia,

Seachem ammonia alert test kit - ammonia,

€11.35
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Fish tank thermometer sticker - tank,

Fish tank thermometer sticker - tank,

€2.48
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Inline tds meter marine - inline, meter,

Inline tds meter marine - inline, meter,

€6.89
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Seachem alert stick - ph, on

Seachem alert stick - ph, on

€10.25
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Wifi bluetooth in 1 water - &,

Wifi bluetooth in 1 water - &,

€74.99
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Seachem alert combo - seachem,

Seachem alert combo - seachem,

€15.29
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Water quality tester ph - 8, 1

Water quality tester ph - 8, 1

€68.60
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Digital aquarium thermometer - aquarium,

Digital aquarium thermometer - aquarium,

€20.62
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Aqua one glass thermometer - aqua,

Aqua one glass thermometer - aqua,

€4.90
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Water quality tester - in, 1

Water quality tester - in, 1

€57.40
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Seachem ammonia combo - &,

Seachem ammonia combo - &,

€16.70
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Aquarium co2 monitor - aquarium, monitor,

Aquarium co2 monitor - aquarium, monitor,

€7.62
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Aquarium thermometer abs - aquarium,

Aquarium thermometer abs - aquarium,

€4.05
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Big screen digital pond - screen,

Big screen digital pond - screen,

€14.99
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New meter for aquarium - new,

New meter for aquarium - new,

€20.57
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Test pen digital - test,

Test pen digital - test,

€8.72
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Aquarium monitor glass - aquarium,

Aquarium monitor glass - aquarium,

€5.87
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Digital tester pen - 1,

Digital tester pen - 1,

€18.99
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Test pen digital - pen, water

Test pen digital - pen, water

€7.79
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Bluelab pen hydroponic - ph,

Bluelab pen hydroponic - ph,

€90.14
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Water quality tester ph - 8,

Water quality tester ph - 8,

€84.89
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Seachem one year combo - one,

Seachem one year combo - one,

€25.45
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Alert seachem stick - ph,

Alert seachem stick - ph,

€15.00
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Inline tds meter - tds, marine

Inline tds meter - tds, marine

€6.69
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Seachem ammonia alert test kit - seachem,

Seachem ammonia alert test kit - seachem,

€11.29
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Digital in1 meter - digital,

Digital in1 meter - digital,

€18.99
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Seachem alert combo - seachem,

Seachem alert combo - seachem,

€15.20
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Inline tds meter - inline, marine

Inline tds meter - inline, marine

€10.99
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Co2 indicator solution ista - solution,

Co2 indicator solution ista - solution,

€5.95
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Inline tds meter marine - inline, meter,

Inline tds meter marine - inline, meter,

€7.49
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Water quality tester ph - in,

Water quality tester ph - in,

€62.55
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Seachem ammonia alert - ammonia,

Seachem ammonia alert - ammonia,

€11.05
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Aqua one glass thermometer - aqua,

Aqua one glass thermometer - aqua,

€5.06
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Seachem ammonia alert test - ammonia, kit

Seachem ammonia alert test - ammonia, kit

€10.85
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Digital ph meter tds - digital,

Digital ph meter tds - digital,

€18.99
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Fast reliable in 1 - fast, &

Fast reliable in 1 - fast, &

€10.95
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W218 1 wifi smart - wifi,

W218 1 wifi smart - wifi,

€59.95
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New meter for aquarium - new,

New meter for aquarium - new,

€19.69
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Seachem ammonia combo - ph,

Seachem ammonia combo - ph,

€15.79
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Co2 indicator tester - indicator, aquarium

Co2 indicator tester - indicator, aquarium

€12.94
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Digital tds ec - in,

Digital tds ec - in,

€8.50
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Inline tds meter - inline, monitor

Inline tds meter - inline, monitor

€45.99
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Jad analogue thermometer 03 - jad,

Jad analogue thermometer 03 - jad,

€3.49
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Aquarium co2 monitor - co2,

Aquarium co2 monitor - co2,

€10.10
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New meter for aquarium - meter,

New meter for aquarium - meter,

€19.60
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Inline tds meter marine - tds, meter,

Inline tds meter marine - tds, meter,

€10.99
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Danoplus smart water quality - danoplus,

Danoplus smart water quality - danoplus,

€44.99
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Aquarium thermometer abs - thermometer,

Aquarium thermometer abs - thermometer,

€5.12
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Aquarium monitor solution - aquarium,

Aquarium monitor solution - aquarium,

€5.52
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Co2 drop checker glass - co2,

Co2 drop checker glass - co2,

€11.18
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Tds tester digital - ph, meter

Tds tester digital - ph, meter

€7.96
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Inline tds meter marine - tds,

Inline tds meter marine - tds,

€7.99
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Aquarium co2 monitor - aquarium,

Aquarium co2 monitor - aquarium,

€6.34
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Betta glass thermometer - betta,

Betta glass thermometer - betta,

€4.39
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Aquarium fish tank - aquarium, co2

Aquarium fish tank - aquarium, co2

€11.45
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Meter for aquarium - ph,

Meter for aquarium - ph,

€19.75
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Par meter cradle for - par,

Par meter cradle for - par,

€9.72
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Drop checker aquarium co2 - drop,

Drop checker aquarium co2 - drop,

€3.19
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Digital aquarium thermometer - digital,

Digital aquarium thermometer - digital,

€6.79
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Digital meter tester water - digital, ph

Digital meter tester water - digital, ph

€12.49
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Inline tds meter marine - tds, meter,

Inline tds meter marine - tds, meter,

€22.99
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Energy saving automatic ato - energy-saving,

Energy saving automatic ato - energy-saving,

€71.95
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Seachem alert stick on - seachem,

Seachem alert stick on - seachem,

€10.95
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Versatile 100 piece strips - 100-piece,

Versatile 100 piece strips - 100-piece,

€9.99
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Par meter cradle for seneye - cradle,

Par meter cradle for seneye - cradle,

€9.72
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Seachem alert continous - seachem,

Seachem alert continous - seachem,

€11.14
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Seachem alert continuous - alert,

Seachem alert continuous - alert,

€11.20
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Digital in1 - digital,

Digital in1 - digital,

€17.99
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Waterproof fish tank - waterproof,

Waterproof fish tank - waterproof,

€5.24
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Hygger aquarium light full - aquarium, light,full

Hygger aquarium light full - aquarium, light,full

€37.10
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Seachem ammonia alert stick - alert,

Seachem ammonia alert stick - alert,

€14.99
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15ml aquarium co2 indicators - 15ml,

15ml aquarium co2 indicators - 15ml,

€3.86
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Transparent mini aquarium tank - mini,

Transparent mini aquarium tank - mini,

€14.99
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Glass drop checker - glass, aquarium

Glass drop checker - glass, aquarium

€5.62
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Aquadyne octopus 3000 - aquadyne,

Aquadyne octopus 3000 - aquadyne,

€39.99
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Inline tds meter marine - tds,

Inline tds meter marine - tds,

€9.97
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2pcs fish tank digital - 2pcs,

2pcs fish tank digital - 2pcs,

€11.99
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Digital triple tds meter - hm,

Digital triple tds meter - hm,

€44.99
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Digital aquarium thermometer - aquarium,

Digital aquarium thermometer - aquarium,

€6.71
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Brand new aquarium - , tank

Brand new aquarium - , tank

€4.73
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Co2 drop checker - drop,

Co2 drop checker - drop,

€11.18
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Meter tester aquarium pool - meter,

Meter tester aquarium pool - meter,

€5.30
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Aqua one glass - one,

Aqua one glass - one,

€4.95
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Ammonia alert year - ammonia, 1

Ammonia alert year - ammonia, 1

€15.00
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Aquarium crystal glass co2 - glass,

Aquarium crystal glass co2 - glass,

€6.10
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Combo temperature - 2-in-1,

Combo temperature - 2-in-1,

€56.99
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Easy use ammonia ph - easy-to-use,

Easy use ammonia ph - easy-to-use,

€25.90
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📊96 listings · from €2.48 · avg €19.29

Browse 96 aquarium monitor listings currently in our index. Prices range from €2.48 to €104.7, with an average of €19.29. 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 aquarium monitor →

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Everything you need to know about aquarium monitor

Whether you are looking for a brand-new or second-hand aquarium monitor, eBay offers one of the largest selections available online. With 96 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 €2.48, while premium listings can reach €104.7 — giving you a wide budget spread to work with. The average price of €19.29 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.

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