Marine Water Aquarium Test Kits

604 results

SALIFERT PROFI TEST KIT RANGE MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK
Brand new · Salifert
(31)
£10.50 to £34.95
Free postage
Click & Collect
112 sold
Hanna Master Test Kit + Salinity Tester Bundle
Pre-owned
£312.68
or Best Offer
£4.48 P&P
6-in-1 FISH TANK TEST STRIPS MARINE TROPICAL AQUARIUM TEST STRIPS 100pcs IN-326
Brand new
£7.95
Free postage
Click & Collect
485 sold
Hanna Marine Phosphorus ULR Checker Ultra Low Marine Aquarium
Pre-owned
£54.76
£7.99 P&P
Click & Collect
Hanna HI-97105 Marine Master Multiparameter Photometer
Brand new
£250.00
or Best Offer
Free postage
Hanna Checker High Range Marine Nitrate HI-782 Pocket Checker /Reagent pack
Brand new
£29.99
Free postage
Click & Collect
70 sold
API Test Kits Ammonia Nitrate Nitrite pH KH GH Phosphate Freshwater Marine
Brand new · API
(7)
£8.49 to £19.99
Free postage
Click & Collect
SEACHEM AMMONIA ALERT TEST KIT AMMONIA MONITOR MARINE FRESH AQUARIUM FISH TANK
Brand new · Seachem
(98)
£11.05
Free postage
Click & Collect
4,160 sold
API MASTER TEST KITS FRESH WATER MARINE REEF SALTWATER STRIPS WATER FISH TANK
Brand new · API
(7)
£12.99 to £34.99
Free postage
Click & Collect
173 sold
Seachem Ammonia Alert Stick On Aquarium Monitor Test Kit NH4 Fish Tank
Brand new · Seachem
(98)
£10.85
Free postage
Click & Collect
274 sold
TMC Salifert Profi Test Kit Saltwater Marine Reef Water Testing Coral Fish Tank
Brand new · Salifert
(13)
£10.09 to £13.40
Free postage
Click & Collect
97 sold
REEF ZLEMENTS ICP TEST ***UK lab testing super fast results ****
Brand new
£23.56
Free postage
API MASTER SALTWATER TEST KIT MARINE pH AMMONIA FISH & REEF TANK AQUARIUM
Brand new · API
(69)
£29.99
Free postage
Click & Collect
Only 1 left.
NT Labs Marine Lab Multi Test Kit Master Reef NH3 NO2 NO3 pH Aquarium Fish Tank
Brand new
£27.45
Free postage
Click & Collect
13 sold
SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK FULL SET
Brand new · Salifert
(15)
£74.99
Free postage
Click & Collect
169 sold
Fauna Marin ICP Test Lab Reef Marine Water Analysis **free post ***
Brand new
£28.49
Free postage
Click & Collect
189 sold
API Saltwater Master Test Kit for Saltwater Aquarium 550-Test Kit
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
(69)
£24.49
(£24.49/Unit)
Free postage
Click & Collect
274 sold
JBL CombiSet Marine Aquarium Test Kit- pH, KH, NH4, NO2, NO3, PO4 Combi Set
Brand new · JBL
(4)
£39.95
Free postage
Click & Collect
270 sold
API Reef Master Test Kit Tests Calcium Carbonate Hardness Phosphate & Nitrite
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
(7)
£27.49
(£27.49/Unit)
Free postage
Click & Collect
82 sold
HI782 Marine Nitrate High Range Checker - Hanna Instruments
Brand new
£82.49
Free postage
Click & Collect
Only 1 left.
Reef Zlements ICP Saltwater Test Kits Send Off Specialist Testing Aquarium Fish
Brand new
£28.99 to £39.99
Free postage
Click & Collect
48 sold
Salifert Calcium Magnesium Kh/alk test kit (one of each)
Brand new · Salifert
(9)
£33.99
Free postage
Click & Collect
SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK NO2 NO3 PO4
Brand new
£29.95
Free postage
Click & Collect
NT Labs Marine Coral Dip 30ml treats coral with stowaway organisms
Brand new
(2)
£11.69
Free postage
Click & Collect
42 sold
Hanna Instruments Marine Alkalinity dKH Checker HI772-26
Pre-owned
£47.48
£2.94 P&P
0 bids
1d 2h
REEF ZLEMENTS ICP TEST ***UK lab testing super fast results ****
Brand new
£28.85
Free postage
Click & Collect
97 sold
SEACHEM AMMONIA ALERT TEST KIT AMMONIA MONITOR MARINE FRESH AQUARIUM FISH TANK
Brand new · Seachem
(98)
£10.85
Free postage
Click & Collect
Only 3 left
Hanna 35ppt Salinity Calibration Sachet x1 (20ml)
Brand new
£3.99
Free postage
59 sold
SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK NH3 NO2 NO3
Brand new
£28.99
Free postage
Click & Collect
150 sold
Oceamo ICP Saltwater Test Kits Send Off Specialist Testing Aquarium Reef Marine
Brand new
£39.99
Free postage
77 sold
SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK FULL SET
Brand new
£74.90
Free postage
Click & Collect
NT Labs Marine Lab Multi Test Kit Reef NH3 NO2 NO3 pH KH Mg Ca PO4 Aquarium Tank
Brand new
£28.95 to £56.99
Free postage
Click & Collect
74 sold
API REEF MASTER LIQUID TEST KIT FOR MARINE CORAL REEF AQUARIUM FISH TANK
Brand new · API
£29.99
Free postage
Click & Collect
372 sold
SALIFERT pH PROFI TEST KIT FOR SALTWATER MARINE (50 TESTS) FISH TANK AQUARIUM
Brand new
£10.25
Free postage
Click & Collect
426 sold
API Test Tube STATION Holder Rack Tropical Marine Fish Tank Aquarium
Brand new · API
£11.75 to £14.50
Free postage
Click & Collect
21 sold
New listingSeachem Ammonia Alert Continuous Aquarium Test Marine & Freshwater Fish Tank
Brand new · Seachem
(98)
£13.99
(£13.99/Unit)
Free postage
Hanna Alkalinity Checker for Marine Systems With Reagent And Calibration Set
Pre-owned
£27.00
£3.38 P&P
5 bids
10h 51m
Reef Zlements ICP Saltwater Test Kits Send Off Specialist UK TESTING SUPPER FAST
Brand new
£28.85 to £83.95
Free postage
Click & Collect
Seachem Ammonia Alert Continuous Aquarium Test Marine & Freshwater Fish Tank
Brand new · Seachem
(98)
£13.99
(£13.99/Unit)
Free postage
Click & Collect
66 sold
Hanna High Range Nitrate Reagent HI-782-25
Brand new
£26.95
Free postage
Hanna HI-774-25 Reagents for the HI-774 Marine phosphate ULR Checker *low price*
Brand new
£17.99
Free postage
Click & Collect
Only 2 left
Ph Test Kit MARINE Aquarium Water Liquid Test Kit -AQUA ONE - SALT WATER PH
Brand new · Tétra
(1)
£9.85
Free postage
Click & Collect
NT Labs Marine Lab Reef Multi-Test Kit
Brand new
(1)
£32.99
Free postage
Click & Collect
SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK KH MG CA
Brand new
£34.95
Free postage
Click & Collect
241 sold
HANNA Salinity Calibration Fluid 35ppt 5 x 20ml Sachets for HI98319
Brand new
£15.94
Free postage
Click & Collect
150 sold
Red Sea Nitrate Pro Test Kit Refill Marine Aquarium Coral Fish Tank Low Date
New (other) · Red Sea
£13.99
Free postage
Click & Collect
Seachem Ammonia Alert Test Kit (1year) Monitors Marine & Fresh Water Aquarium
Brand new · Seachem
(98)
£11.99
Free postage
Click & Collect
134 sold
Seachem MultiTest IODINE IODIDE Liquid Water Test Kit Marine Aquariums
Brand new · Seachem
(3)
£16.74
Free postage
Only 2 left
API REEF MASTER TEST KIT - Calcium Carbonate Hardness Phosphate Nitrate Aquarium
Brand new · API
(7)
£31.49
Free postage
5 watching
Red Sea Phosphate Marine Test Kit Aquarium Saltwater Coral Fish Tank (Low Date)
New (other) · Red Sea
£13.99
Free postage
Click & Collect
Fluval Sea Hydrometer Specific Gravity Salt Tester Marine Fish Tank Aquarium
Brand new · Fluval
(31)
£9.72
Free postage
Click & Collect
188 sold
eSHa Aquarium Fish Tank Treatments Gastopex Heximata Gdex NDX 2000 Exit Optima
Brand new
(113)
£7.49 to £14.49
Free postage
Click & Collect
536 sold
API Calcium Liquid Water Test Kit for Saltwater and Marine Aquariums Ca2
Brand new · API
(7)
£11.69
Free postage
Only 2 left
Salifert Test Kit Calcium, Magnesium & KH/Alk Marine Coral Reef Fish Aquarium
Brand new · Salifert
(9)
£34.95
Free postage
Click & Collect
32 sold
Hanaha Marine test kits
Pre-owned
£208.68
£6.16 P&P
Hanna HI-782-25 Marine High Range Nitrate Reagents x25 Tests
Brand new
£26.95
£3.45 P&P
Click & Collect
Red Sea Foundation Kit Holder
Brand new · Unbranded
£8.99
Free postage
Click & Collect
JBL NO3 Nitrate Aquarium Test Kit Fish Tank Freshwater Marine & Refill Liquid
Brand new · JBL
£14.99 to £21.49
Free postage
Click & Collect
Oceamo The Most Advanced and Comprehensive ICP Analysis Available for your Reef
Cheapest & most Advanced analysis in the UK
Brand new
£38.99
Free postage
Click & Collect
Salifert test kit case, Holder, Box, Tritator
Brand new
£8.09
or Best Offer
£2.94 P&P
Click & Collect

Best selling

See all

Salifert 22040 Test Kit
(9)
£13.39 New
£8.00 Used
Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank
(31)
£11.79 New
£9.56 Used
Seachem Ammonia Alert for Freshwater and Marine Water
(98)
£10.85 New
Salifert Phosphate Test Kit Phosphate 60 Tests For Aquarium
(9)
£11.75 New
Salifert KH/Alkalinity Test Kit
(13)
£10.65 New
£5.43 Used
NT Labs Marine Lab Multi Test Kit Reef KH MG Ca Po4 Aquarium Tank
£26.95 New
Salifert Nitrite Test Kit. UK Seller.
(2)
£6.49 New
Salifert Oxygen O2 Profi Test Kit Marine Tropical Coral Saltwater Fish Tank
£7.49 New

Top-rated

See all

API Saltwater Master Test Kit
(69)

100% agree - Would recommend
£24.49 New
Salifert KH/Alkalinity Test Kit
(13)

100% agree - Would recommend
£10.65 New
£5.43 Used
Salifert 22040 Test Kit
(9)

100% agree - Good value
£13.39 New
£8.00 Used
Salifert 5189 pH Test Kit - 45 g
(9)

100% agree - Would recommend
£9.99 New
£9.56 Used
Seachem Ammonia Alert for Freshwater and Marine Water
(98)

95% agree - Would recommend
£10.85 New
Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank
(31)

100% agree - Would recommend
£11.79 New
£9.56 Used
Salifert Nitrate Profi Test Kit Marine Reef Fish
(15)

100% agree - Would recommend
£12.45 New
£8.64 Used
Salifert Phosphate Test Kit Phosphate 60 Tests For Aquarium
(9)

100% agree - Would recommend
£11.75 New

Test/Treatment Parameter

Marine Water Aquarium Test Kits

Shop by category

604 results

SALIFERT PROFI TEST KIT RANGE MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK

Hanna Master Test Kit + Salinity Tester Bundle

6-in-1 FISH TANK TEST STRIPS MARINE TROPICAL AQUARIUM TEST STRIPS 100pcs IN-326

Hanna Marine Phosphorus ULR Checker Ultra Low Marine Aquarium

Hanna HI-97105 Marine Master Multiparameter Photometer

Hanna Checker High Range Marine Nitrate HI-782 Pocket Checker /Reagent pack

API Test Kits Ammonia Nitrate Nitrite pH KH GH Phosphate Freshwater Marine

SEACHEM AMMONIA ALERT TEST KIT AMMONIA MONITOR MARINE FRESH AQUARIUM FISH TANK

API MASTER TEST KITS FRESH WATER MARINE REEF SALTWATER STRIPS WATER FISH TANK

Seachem Ammonia Alert Stick On Aquarium Monitor Test Kit NH4 Fish Tank

TMC Salifert Profi Test Kit Saltwater Marine Reef Water Testing Coral Fish Tank

REEF ZLEMENTS ICP TEST ***UK lab testing super fast results ****

API MASTER SALTWATER TEST KIT MARINE pH AMMONIA FISH & REEF TANK AQUARIUM

NT Labs Marine Lab Multi Test Kit Master Reef NH3 NO2 NO3 pH Aquarium Fish Tank

SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK FULL SET

Fauna Marin ICP Test Lab Reef Marine Water Analysis **free post ***

API Saltwater Master Test Kit for Saltwater Aquarium 550-Test Kit

JBL CombiSet Marine Aquarium Test Kit- pH, KH, NH4, NO2, NO3, PO4 Combi Set

API Reef Master Test Kit Tests Calcium Carbonate Hardness Phosphate & Nitrite

HI782 Marine Nitrate High Range Checker - Hanna Instruments

Reef Zlements ICP Saltwater Test Kits Send Off Specialist Testing Aquarium Fish

Salifert Calcium Magnesium Kh/alk test kit (one of each)

SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK NO2 NO3 PO4

NT Labs Marine Coral Dip 30ml treats coral with stowaway organisms

Hanna Instruments Marine Alkalinity dKH Checker HI772-26

REEF ZLEMENTS ICP TEST ***UK lab testing super fast results ****

SEACHEM AMMONIA ALERT TEST KIT AMMONIA MONITOR MARINE FRESH AQUARIUM FISH TANK

Hanna 35ppt Salinity Calibration Sachet x1 (20ml)

SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK NH3 NO2 NO3

Oceamo ICP Saltwater Test Kits Send Off Specialist Testing Aquarium Reef Marine

SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK FULL SET

NT Labs Marine Lab Multi Test Kit Reef NH3 NO2 NO3 pH KH Mg Ca PO4 Aquarium Tank

API REEF MASTER LIQUID TEST KIT FOR MARINE CORAL REEF AQUARIUM FISH TANK

SALIFERT pH PROFI TEST KIT FOR SALTWATER MARINE (50 TESTS) FISH TANK AQUARIUM

API Test Tube STATION Holder Rack Tropical Marine Fish Tank Aquarium

New listingSeachem Ammonia Alert Continuous Aquarium Test Marine & Freshwater Fish Tank

Hanna Alkalinity Checker for Marine Systems With Reagent And Calibration Set

Reef Zlements ICP Saltwater Test Kits Send Off Specialist UK TESTING SUPPER FAST

Seachem Ammonia Alert Continuous Aquarium Test Marine & Freshwater Fish Tank

Hanna High Range Nitrate Reagent HI-782-25

Hanna HI-774-25 Reagents for the HI-774 Marine phosphate ULR Checker *low price*

Ph Test Kit MARINE Aquarium Water Liquid Test Kit -AQUA ONE - SALT WATER PH

NT Labs Marine Lab Reef Multi-Test Kit

SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK KH MG CA

HANNA Salinity Calibration Fluid 35ppt 5 x 20ml Sachets for HI98319

Red Sea Nitrate Pro Test Kit Refill Marine Aquarium Coral Fish Tank Low Date

Seachem Ammonia Alert Test Kit (1year) Monitors Marine & Fresh Water Aquarium

Seachem MultiTest IODINE IODIDE Liquid Water Test Kit Marine Aquariums

API REEF MASTER TEST KIT - Calcium Carbonate Hardness Phosphate Nitrate Aquarium

Red Sea Phosphate Marine Test Kit Aquarium Saltwater Coral Fish Tank (Low Date)

Fluval Sea Hydrometer Specific Gravity Salt Tester Marine Fish Tank Aquarium

eSHa Aquarium Fish Tank Treatments Gastopex Heximata Gdex NDX 2000 Exit Optima

API Calcium Liquid Water Test Kit for Saltwater and Marine Aquariums Ca2

Salifert Test Kit Calcium, Magnesium & KH/Alk Marine Coral Reef Fish Aquarium

Hanaha Marine test kits

Hanna HI-782-25 Marine High Range Nitrate Reagents x25 Tests

Red Sea Foundation Kit Holder

JBL NO3 Nitrate Aquarium Test Kit Fish Tank Freshwater Marine & Refill Liquid

Oceamo The Most Advanced and Comprehensive ICP Analysis Available for your Reef

Salifert test kit case, Holder, Box, Tritator

Best selling

Salifert 22040 Test Kit

Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank

Seachem Ammonia Alert for Freshwater and Marine Water

Salifert Phosphate Test Kit Phosphate 60 Tests For Aquarium

Salifert KH/Alkalinity Test Kit

NT Labs Marine Lab Multi Test Kit Reef KH MG Ca Po4 Aquarium Tank

Salifert Nitrite Test Kit. UK Seller.

Salifert Oxygen O2 Profi Test Kit Marine Tropical Coral Saltwater Fish Tank

Top-rated

API Saltwater Master Test Kit

Salifert KH/Alkalinity Test Kit

Salifert 22040 Test Kit

Salifert 5189 pH Test Kit - 45 g

Seachem Ammonia Alert for Freshwater and Marine Water

Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank

Salifert Nitrate Profi Test Kit Marine Reef Fish

REEF ZLEMENTS ICP TEST *UK lab testing super fast results **

Fauna Marin ICP Test Lab Reef Marine Water Analysis free post *

REEF ZLEMENTS ICP TEST *UK lab testing super fast results **

Hanna HI-774-25 Reagents for the HI-774 Marine phosphate ULR Checker low price