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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 - digital, ph

V2control digital - digital, ph

€104.70
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Seachem alert continuous - seachem,

Seachem alert continuous - seachem,

€13.99
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Digital inline tds - digital,

Digital inline tds - digital,

€34.99
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Inline tds meter water - meter,

Inline tds meter water - meter,

€7.99
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Seachem ammonia alert stick - seachem,

Seachem ammonia alert stick - seachem,

€10.85
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Inline tds meter marine - tds,

Inline tds meter marine - tds,

€7.99
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Drop checker aquarium - checker, co2

Drop checker aquarium - checker, co2

€3.99
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Inline tds meter marine - inline,

Inline tds meter marine - inline,

€6.99
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Seachem ammonia combo - seachem,

Seachem ammonia combo - seachem,

€14.90
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Seachem ammonia alert test - seachem,

Seachem ammonia alert test - seachem,

€11.35
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Fish tank thermometer sticker - thermometer,

Fish tank thermometer sticker - thermometer,

€2.48
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Inline tds meter marine - tds, meter,

Inline tds meter marine - tds, meter,

€6.89
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Seachem alert stick - ph,

Seachem alert stick - ph,

€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 - 1,

Water quality tester - 1,

€68.60
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Digital aquarium thermometer - digital,

Digital aquarium thermometer - digital,

€20.62
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Aqua one glass thermometer - one,

Aqua one glass thermometer - one,

€4.90
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Water quality tester ph - in,

Water quality tester ph - in,

€57.40
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Seachem ammonia combo - &,

Seachem ammonia combo - &,

€16.70
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Aquarium co2 monitor - co2, monitor,

Aquarium co2 monitor - co2, monitor,

€7.62
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Aquarium thermometer abs - thermometer,

Aquarium thermometer abs - thermometer,

€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 - ph,

Test pen digital - ph,

€8.72
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Aquarium monitor glass - aquarium,

Aquarium monitor glass - aquarium,

€5.87
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Digital tester pen - digital,

Digital tester pen - digital,

€18.99
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Test pen digital water - test,

Test pen digital water - test,

€7.79
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Bluelab pen hydroponic - pen,

Bluelab pen hydroponic - pen,

€90.14
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Water quality tester ph - in,

Water quality tester ph - in,

€84.89
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Seachem one year combo alert - seachem,

Seachem one year combo alert - seachem,

€25.45
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Alert seachem stick on - alert, !

Alert seachem stick on - alert, !

€15.00
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Inline tds meter marine - inline,

Inline tds meter marine - inline,

€6.69
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Seachem ammonia alert - test, kit

Seachem ammonia alert - test, kit

€11.29
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Digital in1 - digital, meter

Digital in1 - digital, meter

€18.99
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Seachem alert combo - alert,

Seachem alert combo - alert,

€15.20
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Inline tds meter marine - tds, meter,

Inline tds meter marine - tds, meter,

€10.99
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Co2 indicator solution - co2,

Co2 indicator solution - co2,

€5.95
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Inline tds meter marine - meter,,

Inline tds meter marine - meter,,

€7.49
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Water quality tester - 1,

Water quality tester - 1,

€62.55
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Seachem ammonia alert stick - ammonia,

Seachem ammonia alert stick - ammonia,

€11.05
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Aqua one glass - aqua, thermometer

Aqua one glass - aqua, thermometer

€5.06
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Seachem ammonia alert test - seachem,

Seachem ammonia alert test - seachem,

€10.85
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Digital ph meter - ph, tds

Digital ph meter - ph, tds

€18.99
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Fast reliable in 1 - in,

Fast reliable in 1 - in,

€10.95
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W218 1 wifi - wifi, smart

W218 1 wifi - wifi, smart

€59.95
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New meter for - meter, aquarium

New meter for - meter, aquarium

€19.69
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Seachem ammonia combo - ph, &

Seachem ammonia combo - ph, &

€15.79
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Co2 indicator tester aquarium - indicator,

Co2 indicator tester aquarium - indicator,

€12.94
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Digital tds ec - in, 1

Digital tds ec - in, 1

€8.50
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Inline tds meter - d-d,

Inline tds meter - d-d,

€45.99
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Jad analogue thermometer 03 - analogue, bt-03

Jad analogue thermometer 03 - analogue, bt-03

€3.49
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Aquarium co2 monitor - aquarium, monitor,

Aquarium co2 monitor - aquarium, monitor,

€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 - inline, meter,

Inline tds meter - inline, meter,

€10.99
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Danoplus smart water quality - smart,

Danoplus smart water quality - smart,

€44.99
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Aquarium thermometer abs - thermometer,

Aquarium thermometer abs - thermometer,

€5.12
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Aquarium monitor solution - monitor,

Aquarium monitor solution - monitor,

€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 meter - tds,

Tds tester digital meter - tds,

€7.96
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Inline tds meter - tds, meter,

Inline tds meter - tds, meter,

€7.99
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Aquarium co2 monitor glass - co2,

Aquarium co2 monitor glass - co2,

€6.34
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Betta glass thermometer - betta,

Betta glass thermometer - betta,

€4.39
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Aquarium fish tank co2 - aquarium,

Aquarium fish tank co2 - aquarium,

€11.45
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Meter for aquarium - ph,

Meter for aquarium - ph,

€19.75
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Par meter cradle for - cradle, seneye

Par meter cradle for - cradle, seneye

€9.72
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Drop checker aquarium co2 - checker,

Drop checker aquarium co2 - checker,

€3.19
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Digital aquarium thermometer - digital,

Digital aquarium thermometer - digital,

€6.79
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Digital meter tester - digital,

Digital meter tester - digital,

€12.49
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Inline tds meter marine - inline,

Inline tds meter marine - inline,

€22.99
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Energy saving automatic ato - automatic,

Energy saving automatic ato - automatic,

€71.95
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Seachem alert stick - seachem, ph

Seachem alert stick - seachem, ph

€10.95
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Versatile 100 piece strips - versatile, 100-piece

Versatile 100 piece strips - versatile, 100-piece

€9.99
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Par meter cradle for - meter, seneye

Par meter cradle for - meter, seneye

€9.72
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Seachem alert continous - seachem, ph

Seachem alert continous - seachem, ph

€11.14
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Seachem alert continuous - alert,

Seachem alert continuous - alert,

€11.20
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Digital in1 meter - ph,

Digital in1 meter - ph,

€17.99
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Waterproof fish tank - fish,

Waterproof fish tank - fish,

€5.24
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Hygger aquarium light - hygger, light,full

Hygger aquarium light - hygger, light,full

€37.10
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Seachem ammonia alert stick - seachem,

Seachem ammonia alert stick - seachem,

€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 - mini, tank

Transparent mini aquarium - mini, tank

€14.99
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Glass drop checker aquarium - glass,

Glass drop checker aquarium - glass,

€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 - triple, meter

Digital triple tds - triple, meter

€44.99
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Digital aquarium thermometer - digital,

Digital aquarium thermometer - digital,

€6.71
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Brand new aquarium fish tank

Brand new aquarium fish tank

€4.73
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Co2 drop checker glass - co2,

Co2 drop checker glass - co2,

€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 - glass, thermometer

Aqua one glass - glass, thermometer

€4.95
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Ammonia alert year monitor - ammonia,

Ammonia alert year monitor - ammonia,

€15.00
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Aquarium crystal glass co2 - aquarium,

Aquarium crystal glass co2 - aquarium,

€6.10
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Combo temperature - 2-in-1, ph

Combo temperature - 2-in-1, ph

€56.99
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Easy use ammonia ph - ammonia, &

Easy use ammonia ph - ammonia, &

€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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