Condition
Purchase
Sort by
Time
Various
Reef octopus classic 100 - octopus, cr-100
£161.90
Buy It Now
Caribsea arm coarse reactor - caribsea,
£92.99
Buy It Now
Gallon arm coarse high - arm,
£35.78
Buy It Now
Two little fishies reborn - reborn, 1
£34.85
Buy It Now
Tmc react 300 compact - v2,
£26.70
Buy It Now
Oceamo reactor o - oceamo,
£144.99
Buy It Now
Tmc react 300 compact - tmc, v2
£26.70
Buy It Now
Deltec twin tech 1500 calcium - twin-tech,
£1127.68
Buy It Now
Deltec co2 regulator and - regulator,
£50.00
Buy It Now
Bubble magus replacement - bubble,
£12.19
Buy It Now
Marine source bio pellet - source,
£80.93
Buy It Now
Bubble magus replacement - magus,
£12.40
Buy It Now
Oceamo regulator 1000ml - o, size
£69.99
Buy It Now
1100 impeller for - 1100, calcium
£12.94
Buy It Now
Oceamo regulator 1000ml - regulator,
£59.99
Buy It Now
Viaaqua ac10 calcium reactor - ac10,
£62.94
Buy It Now
Oceamo regulator and - and, o
£139.99
Buy It Now
Reef octopus cr140 - octopus,
£359.71
Buy It Now
Marine external calcium - external,
£62.94
Buy It Now
Reef octopus sro 5000 - octopus,
£719.42
Buy It Now
Two little fishies reborn - two,
£62.05
Buy It Now
Calcium reactor injector and - calcium,
£76.44
Buy It Now
Reef octopus calcium - octopus,
£584.53
Buy It Now
Seachem reef reactor - reef,
£29.89
Buy It Now
Seachem reef reactor large - large, 4
£29.89
Buy It Now
Seachem reef reactor large - seachem,
£19.90
Buy It Now
Two little fishies - little, reborn
£53.81
Buy It Now
Seachem reef reactor - seachem,
£32.76
Buy It Now
Seachem reef reactor 2 - seachem,
£32.76
Buy It Now
Dastaco2 marine calcium - dastaco2,
£500.00
Buy It Now
Brightwell aquatics neo - brightwell,
£44.14
Buy It Now
Deltec calcium reactor 1500 - deltec,
£873.70
Buy It Now
Calcium reactor system - calcium,
£618.70
Buy It Now
Dastaco 800 litre calcium - 800,
£250.30
Buy It Now
React 600 marine calcium - react,
£42.28
Buy It Now
Looking for more marine calcium reactor?
Search eBay live — fresh results filtered for the best value, updated every hour.
Browse 35 marine calcium reactor listings currently in our index. Prices range from £12.19 to £1127.68, with an average of £187.03. 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 marine calcium reactor →
Try this: fluval 404 | mod podge | ryobi charger 12v | koi filter foam | aquarium external filter uv | kockney koi filter | black decker 12v battery | eheim external | makita bhr200 24 v battery | red sea skimmer
Whether you are looking for a brand-new or second-hand marine calcium reactor, eBay offers one of the largest selections available online. With 35 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 £12.19, while premium listings can reach £1127.68 — giving you a wide budget spread to work with. The average price of £187.03 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.