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Salinity

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PH/TDS/EC/Salinity/Temperature

PH/TDS/EC/Salinity/Temperature

$17.55
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Freshwater salt system - freshwater,

Freshwater salt system - freshwater,

$148.75
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Pool salt tester ph - salt, &

Pool salt tester ph - salt, &

$28.99
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Factory sealed freshwater - factory, salt

Factory sealed freshwater - factory, salt

$139.99
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Seachem prime - seachem,

Seachem prime - seachem,

$9.99
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Eseasongear salt 3050 - eseasongear, salt-3050

Eseasongear salt 3050 - eseasongear, salt-3050

$35.96
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Seachem cichlid lake salt - cichlid,

Seachem cichlid lake salt - cichlid,

$74.71
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Reefing art aquarium salt - reefing,

Reefing art aquarium salt - reefing,

$29.99
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Instant ocean sea salt for - ocean,

Instant ocean sea salt for - ocean,

$49.00
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Seachem safe - seachem,

Seachem safe - seachem,

$127.45
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Hanna hi98319 waterproof - hanna,

Hanna hi98319 waterproof - hanna,

$99.99
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100 salinity - 0-100‰,

100 salinity - 0-100‰,

$17.99
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Aquarium glass hydrometer - glass,

Aquarium glass hydrometer - glass,

$15.50
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40000gallon salt cell chlorine - salt,

40000gallon salt cell chlorine - salt,

$149.99
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Salt chlorination cell - salt,

Salt chlorination cell - salt,

$120.00
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Glx cell turbocell salt - glx-cell-5,

Glx cell turbocell salt - glx-cell-5,

$259.34
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Salinity refractometer salt - refractometer,

Salinity refractometer salt - refractometer,

$15.29
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Api test kit - test,

Api test kit - test,

$11.99
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Hanna instruments marine - instruments,

Hanna instruments marine - instruments,

$150.00
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Salinity refractometer - 0-10%,

Salinity refractometer - 0-10%,

$15.99
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Ghl profilux ex digital - profilux, 3.1n

Ghl profilux ex digital - profilux, 3.1n

$139.99
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Milwaukee digitial seawater - milwaukee,

Milwaukee digitial seawater - milwaukee,

$155.00
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Salt 3000 salinity - salinity, for

Salt 3000 salinity - salinity, for

$19.99
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Prime fresh and - fresh,

Prime fresh and - fresh,

$13.26
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Aquarium marine test sea - test,,

Aquarium marine test sea - test,,

$15.77
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Digital water quality - in,

Digital water quality - in,

$18.20
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Seachem prime dechlorinator - prime,

Seachem prime dechlorinator - prime,

$14.92
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Instant ocean reef crystals - instant,

Instant ocean reef crystals - instant,

$63.99
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Salt chlorine generator cell - salt,

Salt chlorine generator cell - salt,

$270.59
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Morton 12466 professionals - morton,

Morton 12466 professionals - morton,

$27.00
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Orapxi saltwater pool - orapxi,

Orapxi saltwater pool - orapxi,

$37.17
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Pelican water systems - pelican,

Pelican water systems - pelican,

$299.97
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Api saltwater master - saltwater, kit

Api saltwater master - saltwater, kit

$19.12
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New hayward salt - hayward,

New hayward salt - hayward,

$79.95
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Aquarium salt freshwater - aquarium,

Aquarium salt freshwater - aquarium,

$12.60
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Aquarium hydrometer salinity - hydrometer,

Aquarium hydrometer salinity - hydrometer,

$12.99
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Bacnunn aquarium pond fresh - bacnunn, aquarium,

Bacnunn aquarium pond fresh - bacnunn, aquarium,

$11.99
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Instant ocean reef - instant,

Instant ocean reef - instant,

$61.99
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Xtremepowerus universal cell - xtremepowerus,

Xtremepowerus universal cell - xtremepowerus,

$499.95
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Chlorinator salt water system - chlorinator,

Chlorinator salt water system - chlorinator,

$381.19
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Eseasongear salt 3000 meter - eseasongear, salt-3000

Eseasongear salt 3000 meter - eseasongear, salt-3000

$19.99
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Sgs instruments salinity tds - sgs,

Sgs instruments salinity tds - sgs,

$395.00
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Tropic marin high precision - tropic, high-precision

Tropic marin high precision - tropic, high-precision

$42.99
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Terronix smart 1 solar - terronix,

Terronix smart 1 solar - terronix,

$119.99
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Api phosphate test kit - test,

Api phosphate test kit - test,

$14.99
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Meter chlorine tester - ph,

Meter chlorine tester - ph,

$47.35
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Salinity refractometer meter - salinity,

Salinity refractometer meter - salinity,

$15.99
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Premium grade 90 - 1-lb,

Premium grade 90 - 1-lb,

$569.99
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Neptune systems apex - lab, grade

Neptune systems apex - lab, grade

$139.99
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Lamotte pro digital - pro,

Lamotte pro digital - pro,

$137.12
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Salinity refractometer for - refractometer,

Salinity refractometer for - refractometer,

$26.99
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Hanna salinity calibration - salinity,

Hanna salinity calibration - salinity,

$35.00
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Lamotte salt tds and - –,

Lamotte salt tds and - –,

$120.00
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Seachem stability - seachem,

Seachem stability - seachem,

$13.99
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Digital salinity tester - digital, for

Digital salinity tester - digital, for

$36.68
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R0452500 jandy zodiac salinity - r0452500,

R0452500 jandy zodiac salinity - r0452500,

$99.99
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Sea salt gallons for - sea,

Sea salt gallons for - sea,

$28.97
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Salinity refractometer - salinity,

Salinity refractometer - salinity,

$24.95
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Hydrometer saltwater aquarium - saltwater,

Hydrometer saltwater aquarium - saltwater,

$12.73
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Milwaukee ma887 digital - milwaukee,

Milwaukee ma887 digital - milwaukee,

$99.00
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Freshwater aquarium salt - freshwater,

Freshwater aquarium salt - freshwater,

$13.12
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Milwaukee ma887 digital - milwaukee,

Milwaukee ma887 digital - milwaukee,

$79.99
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Hydrospace pns probio 16oz - probio,

Hydrospace pns probio 16oz - probio,

$35.99
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American marine pinpoint - american,

American marine pinpoint - american,

$13.95
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Aquarium hydrometer and - hydrometer,

Aquarium hydrometer and - hydrometer,

$9.99
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Instant ocean hydrometer - instant,

Instant ocean hydrometer - instant,

$15.16
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5lb salt water test - test, strips

5lb salt water test - test, strips

$30.99
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Hanna 98319 marine - hanna, hi-98319

Hanna 98319 marine - hanna, hi-98319

$91.05
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Boxtech aquarium hydrometer - aquarium,

Boxtech aquarium hydrometer - aquarium,

$15.19
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1 digital - 7,

1 digital - 7,

$21.45
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Filtertech hanna waterproof - filtertech,

Filtertech hanna waterproof - filtertech,

$85.99
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Aquarium marine test sea - aquarium,

Aquarium marine test sea - aquarium,

$19.79
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Boxtech aquarium hydrometer - boxtech,

Boxtech aquarium hydrometer - boxtech,

$15.32
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Smart aquarium water quality - smart,

Smart aquarium water quality - smart,

$79.90
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Pool salt tester ph - in,

Pool salt tester ph - in,

$21.99
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Salt substitute sodum - nu-salt,

Salt substitute sodum - nu-salt,

$19.57
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Salinity refractometer meter - refractometer,

Salinity refractometer meter - refractometer,

$15.99
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Boxtech aquarium hydrometer - aquarium,

Boxtech aquarium hydrometer - aquarium,

$14.39
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Portable salinity salt - portable,

Portable salinity salt - portable,

$15.99
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Salt meter ph - ph, tds

Salt meter ph - ph, tds

$31.61
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Api calcium test - calcium,

Api calcium test - calcium,

$13.99
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Pool salt tester digital - pool, tester,

Pool salt tester digital - pool, tester,

$27.78
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Atago pal 06s - atago, seawater

Atago pal 06s - atago, seawater

$89.00
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Hanna instruments hi70024p - hanna,

Hanna instruments hi70024p - hanna,

$39.00
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Instant ocean sea - salt, for

Instant ocean sea - salt, for

$49.99
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Salt meter 3000 - salt-3000, &

Salt meter 3000 - salt-3000, &

$19.99
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Wifi salinity monitor - &, for

Wifi salinity monitor - &, for

$90.99
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Red sea coral pro salt - red,

Red sea coral pro salt - red,

$97.79
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Instant ocean sea - instant,

Instant ocean sea - instant,

$49.99
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New oakton cond - new, 6+

New oakton cond - new, 6+

$295.00
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Vivosun lcd digital - 5,

Vivosun lcd digital - 5,

$33.29
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Api copper test kit - api,

Api copper test kit - api,

$15.49
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100 salinity - 0-100‰,

100 salinity - 0-100‰,

$18.39
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Instant ocean reef crystals - instant,

Instant ocean reef crystals - instant,

$64.00
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R0693900 replacement salt cell - replacement,

R0693900 replacement salt cell - replacement,

$277.46
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Salt water pool chlorinator - water,

Salt water pool chlorinator - water,

$221.99
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📊96 listings · from $9.99 · avg $80.49

Browse 96 salinity listings currently in our index. Prices range from $9.99 to $569.99, with an average of $80.49. 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 salinity →

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Everything you need to know about salinity

Whether you are looking for a brand-new or second-hand salinity, 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 $9.99, while premium listings can reach $569.99 — giving you a wide budget spread to work with. The average price of $80.49 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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