Nitrate Aquarium Water Test Kits

772 results

New listingHanna Checker Set
Pre-owned
£125.48
or Best Offer
£3.42 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
471 sold
AQUAVERITY 7 IN 1 POND TEST STRIPS QUICK & EASY TO USE IN GARDEN PONDS 50 STRIPS
Brand new
£9.95
Free postage
Click & Collect
139 sold
NT LABS POND LAB 200 MULTI TEST KIT MASTER PONDLAB WATER SET PH GH KH NO2 NO4
Brand new · NT Labs
(116)
£25.99
Free postage
Click & Collect
2,787 sold
API FRESH WATER MASTER TEST KIT 800 TESTS AQUARIUM FISH TANK pH Nitrate/Nitrite
Brand new · API
£29.95
Free postage
Click & Collect
3,795 sold
API 500 Pond Master Test Kit Tests pH, Ammonia, Nitraite & Phosphate
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
(72)
£24.79
(£24.79/Unit)
Free postage
Click & Collect
458 sold
API Freshwater Master Test Kit Liquid pH Ammonia Nitrite Nitrate for Fish Tank
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
(243)
£29.99
(£29.99/Unit)
Free postage
Click & Collect
1,229 sold
NT LABS AQUARIUM LAB MULTI-TEST MASTER KIT WATER TESTING TROPICAL FISH TANK
Brand new
(232)
£25.99
Free postage
Click & Collect
7,289 sold
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
111 sold
API Test Kits Ammonia Nitrate Nitrite pH KH GH Phosphate Freshwater Marine
Brand new · API
(4)
£8.49 to £19.99
Free postage
Click & Collect
TETRA POND STRIPS 6 IN 1 QUICK TEST KIT KOI FISH WATER QUALITY QUICK TETRAPOND
Brand new · Tétra
(118)
£12.99
Free postage
Click & Collect
2,269 sold
NT Labs Mini Test Kit 120 Tests For Freshwater & Tropical Aquariums Fish Tank
Brand new · NT Labs
(68)
£13.95
Free postage
Click & Collect
1,836 sold
7 in 1 Aquarium Water Test Strips Kit - 7 Parameters in 30 Secs - pH, Nitrite +
Brand new
£5.99
(£0.12/100ml)
Free postage
Click & Collect
77 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
Envii Pond Test Strips - Quick & Easy Test Kit Contains 25 Test Strips
Brand new
(10)
£11.95
Free postage
Click & Collect
723 sold
NT Labs Marine Lab Multi Test Kit Master Reef NH3 NO2 NO3 pH Aquarium Fish Tank
Brand new
£27.45
Free postage
Click & Collect
API 5 in 1 AQUARIUM WATER TEST KIT DIP 25 STRIPS FRESHWATER SALTWATER FISH TANK
Brand new · API
(46)
£5.99 to £12.99
Free postage
Click & Collect
366 sold
API POND MASTER TEST KIT GOLDFISH KOI TESTKIT POND CARE WATER FISH HEALTH GARDEN
Brand new · API
(72)
£25.99
Free postage
Click & Collect
610 sold
API Freshwaster And Saltwater Aquarium Test Kits
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
£6.99 to £29.99
Free postage
Est. delivery Tue, Aug 5
129 sold
NT LABS TEST KITS TROPICAL/COLDWATER AQUARIUM LAB WATER TESTING FISH TANK
Brand new
(4)
£7.95 to £25.99
Free postage
Click & Collect
504 sold
API Test Strips 5 in 1 pH KH GH Nitrate Nitrite Aquarium Fish Tank Water Quality
Brand new · API
(4)
£11.99 to £26.99
Free postage
Click & Collect
22 sold
Colombo AquaTest Test Lab Professional Pond/Fresh/Marine Test Kit Advanced Fish
Brand new · Colombo
(38)
£39.95
Free postage
Click & Collect
429 sold
API Nitrate Test Kit for Freshwater & Saltwater Aquarium 90-Test Kit
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
(33)
£11.99
(£11.99/Unit)
Free postage
Click & Collect
417 sold
API 5ml Test Tubes Spare for Test Kit with Caps Replacement Aquarium Fish Tank
Brand new · API
(2)
£4.05 to £21.80
Free postage
84 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
273 sold
Watersafe Drinking Water Test Kit for Well or Tap Water WS-425C
Brand new
£29.99
Free postage
Click & Collect
839 sold
TMC Salifert Profi Test Kit Saltwater Marine Reef Water Testing Coral Fish Tank
Brand new · Salifert
(9)
£10.09 to £13.40
Free postage
Click & Collect
58 sold
Hanna Checker High Range Marine Nitrate HI-782 Pocket Checker /Reagent pack
Brand new
£29.99
Free postage
Click & Collect
70 sold
API Aquarium test kit tube holder and drying rack
Brand new
£16.13
£4.00 P&P
23 watching
SALIFERT TEST KIT SET MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK FULL SET
Brand new · Salifert
(15)
£74.99
Free postage
Click & Collect
168 sold
JBL CombiSet Test Kit For Freshwater Aquarium- pH, KH, CO2, NO2, NO3 + NH4
Brand new · JBL
(4)
£39.95
Free postage
Click & Collect
204 sold
100X 7 in 1 PH Test Fish Tank Water Tropical Aquarium Pond Water Test Strips Kit
Brand new · Unbranded
£7.99
Free postage
Click & Collect
Only 3 left
API 5-IN-1 Test Strips Freshwater and Saltwater Aquarium Test Strips Pack of 100
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
(4)
£17.89
(£17.89/Unit)
Free postage
Click & Collect
440 sold
API MASTER TEST KITS FRESH WATER MARINE REEF SALTWATER STRIPS WATER FISH TANK
Brand new · API
(243)
£12.99 to £32.99
Free postage
Click & Collect
698 sold
HI782 Marine Nitrate High Range Checker - Hanna Instruments
Pre-owned
£54.76
£7.99 P&P
Click & Collect
NT Labs PondLab Multi Test Kit Water Testing NTLabs - pH GH KH NO2 NO3 NO4
Brand new · NT Labs
(116)
£28.45
Free postage
Click & Collect
Only 2 left
Tetra 6 in 1 Water Test Kit Aquarium - Nitrate PH KH Nitrite Tropical Fish Tank
Brand new · Tétra
(25)
£7.25
Free postage
Click & Collect
1,095 sold
API 800 Test Freshwater Aquarium Water Master Test Kit Free and Fast Delivery...
Brand new · API
(243)
£51.95
Free postage
Click & Collect
Only 1 left.
Envii Pond Parameter Treatment - Test, Monitor & Correct Pond Water pH & Nitrate
Brand new
£44.95 to £61.95
Free postage
Click & Collect
API & NT Labs Compatible Aquarium Test Tube Holder – 5 Slot Test Kit Stand
Brand new · API
£10.77
or Best Offer
£2.94 P&P
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
Tetra Nitrite Test Kit for Ponds and Aquariums
Brand new · Tétra
(9)
£6.99
Free postage
Click & Collect
Water Testing Strips Kit Nitrate Nitrite Total Hardness Total Alkalinity pH x 5
Brand new
(6)
£3.99
Free postage
819 sold
SimplexHealth Nitrate & Nitrite Water Test (50 strips)
Brand new
(1)
£21.99
Free postage
Click & Collect
NT Labs Marine Lab Multi Test Kit Reef NH3 NO2 NO3 pH KH Mg Ca PO4 Aquarium Tank
Brand new
(1)
£31.99
Free postage
Click & Collect
67 sold
Aquarium Test Tube Holder Rack Tropical / Pond Fish NT Labs Kit Stand Station
Brand new
£11.75
Free postage
Click & Collect
30 sold
Tetra 6in1 Aquarium Test Kit Tropical PH KH GH NO2 NO3 Chlorine 25 Strips
Brand new · Tétra
(25)
£9.99
Free postage
Click & Collect
33 sold
NT Labs Multi Test Lab For Aquarium NH4 NO2 NO3 PH GH KH Fish Tank Test Kit
Brand new
(232)
£24.99
Free postage
Click & Collect
139 sold
API Saltwater Master Test Kit exp 03/26
Brand new · API
(69)
£18.27
or Best Offer
£2.94 P&P
SimplexHealth Nitrate & Nitrite Water Test (50 strips)
Brand new
£14.99
Free postage
Click & Collect
119 sold
Aquaforest Test Pro Kit Alkalinity Ca Mg Nitrate Phosphate Aquarium Fish Tank
Brand new
(3)
£14.99 to £44.95
Free postage
Click & Collect
JBL PROSCAN WATER ANALYSIS KIT & RECHARGE REFILL TEST SMARTPHONE AQUARIUM TANK
Brand new · JBL
(47)
£14.75 to £28.99
Free postage
Click & Collect
592 sold
API Pond 5 in 1 Test Strips Pack Of 4 - Garden Pond Water Test Kit Fish Health
Brand new · API
(46)
£6.40
Free postage
1,095 sold
API NITRATE TEST KIT TROPICAL COLDWATER AND MARINE FISH TANK AQUARIUM
Brand new · API
(33)
£11.90
Free postage
Click & Collect
177 sold
Salifert Magnesium MG & Calcium CA Profi Test Kit Marine Fish Tank Reef Aquarium
Pre-owned · Salifert
(31)
£1.13
£2.94 P&P
1 bid
8h 54m
NT LABS MARINE LAB TEST KITS TESTING KITS SALTWATER FISH AQUARIUM TEST
Brand new
(2)
£9.85 to £12.75
Free postage
Click & Collect
NT LABS MARINE MULTI AND REEF TEST KITS FOR AQUARIUM FISH TANKS TESTING KITS
Brand new · Aqua Medic
£27.75 to £33.95
Free postage
Click & Collect
NT Labs Test Kit Aquarium Fish Tank Tropical Freshwater Lab Testing pH & More
Brand new
(6)
£11.49
Free postage
Click & Collect
38 sold
5 in1 Aquarium Water Test Kit, Fish Tank Tester Strips (50-200 Strips) Bulk UK
Cheapest Bulk Option - UK Based - Free P&P RM48
Brand new
£5.85 to £12.95
Free postage
Click & Collect
100pcs 16 IN 1 Drinking Water Test Strips For Home Well Water Quality Testing
Brand new · Unbranded
£14.98
Free postage

Best selling

See all

NT Labs Aquarium Lab Multi-test Kit - NTLABS
(232)
£24.99 New
NT Labs Pondlab 200 Pond Water Parameter Test Kit (026322)
(116)
£25.99 New
API 164M Pond Care Master Test Kit
(72)
£24.79 New
API Freshwater Master Test Kit pH No2 Tropical Fish Tank
(243)
£51.95 New
API 5 in 1 Aquarium Test Kit - 4 Pack
(46)
£4.45 New
Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank
(31)
£11.79 New
£9.56 Used
Tetra Pond Test Strip 6 in 1 (T6912)
(118)
£12.95 New
API LR1800 Nitrate Aquarium Fish Tank Fresh and Salt Water Test Kit - 90 Tests
(33)
£11.90 New

Top-rated

See all

API Freshwater Master Test Kit pH No2 Tropical Fish Tank
(243)

98% agree - Would recommend
£51.95 New
NT Labs Aquarium Lab Multi-test Kit - NTLABS
(232)

97% agree - Would recommend
£24.99 New
Tetra Test 6in1 Strips Aquarium to Test 6 Essential Water Quality Parameters - Pack of 25
(144)

100% agree - Would recommend
£6.99 New
NT Labs Pondlab 200 Pond Water Parameter Test Kit (026322)
(116)

98% agree - Would recommend
£25.99 New
API 55898 5 in 1 Aquarium Test Strips - Pack of 25
(73)

100% agree - Would recommend
£6.00 New
API 164M Pond Care Master Test Kit
(72)

100% agree - Would recommend
£24.79 New
API Saltwater Master Test Kit
(69)

100% agree - Would recommend
£17.00 New
NT Labs Aquarium Water pH Test Kit - 120 Count
(68)

100% agree - Would recommend
£10.69 New

Nitrate Aquarium Water Test Kits

Shop by category

772 results

New listingHanna Checker Set

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

AQUAVERITY 7 IN 1 POND TEST STRIPS QUICK & EASY TO USE IN GARDEN PONDS 50 STRIPS

NT LABS POND LAB 200 MULTI TEST KIT MASTER PONDLAB WATER SET PH GH KH NO2 NO4

API FRESH WATER MASTER TEST KIT 800 TESTS AQUARIUM FISH TANK pH Nitrate/Nitrite

API 500 Pond Master Test Kit Tests pH, Ammonia, Nitraite & Phosphate

API Freshwater Master Test Kit Liquid pH Ammonia Nitrite Nitrate for Fish Tank

NT LABS AQUARIUM LAB MULTI-TEST MASTER KIT WATER TESTING TROPICAL FISH TANK

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

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

TETRA POND STRIPS 6 IN 1 QUICK TEST KIT KOI FISH WATER QUALITY QUICK TETRAPOND

NT Labs Mini Test Kit 120 Tests For Freshwater & Tropical Aquariums Fish Tank

7 in 1 Aquarium Water Test Strips Kit - 7 Parameters in 30 Secs - pH, Nitrite +

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

Envii Pond Test Strips - Quick & Easy Test Kit Contains 25 Test Strips

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

API 5 in 1 AQUARIUM WATER TEST KIT DIP 25 STRIPS FRESHWATER SALTWATER FISH TANK

API POND MASTER TEST KIT GOLDFISH KOI TESTKIT POND CARE WATER FISH HEALTH GARDEN

API Freshwaster And Saltwater Aquarium Test Kits

NT LABS TEST KITS TROPICAL/COLDWATER AQUARIUM LAB WATER TESTING FISH TANK

API Test Strips 5 in 1 pH KH GH Nitrate Nitrite Aquarium Fish Tank Water Quality

Colombo AquaTest Test Lab Professional Pond/Fresh/Marine Test Kit Advanced Fish

API Nitrate Test Kit for Freshwater & Saltwater Aquarium 90-Test Kit

API 5ml Test Tubes Spare for Test Kit with Caps Replacement Aquarium Fish Tank

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

Watersafe Drinking Water Test Kit for Well or Tap Water WS-425C

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

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

API Aquarium test kit tube holder and drying rack

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

JBL CombiSet Test Kit For Freshwater Aquarium- pH, KH, CO2, NO2, NO3 + NH4

100X 7 in 1 PH Test Fish Tank Water Tropical Aquarium Pond Water Test Strips Kit

API 5-IN-1 Test Strips Freshwater and Saltwater Aquarium Test Strips Pack of 100

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

HI782 Marine Nitrate High Range Checker - Hanna Instruments

NT Labs PondLab Multi Test Kit Water Testing NTLabs - pH GH KH NO2 NO3 NO4

Tetra 6 in 1 Water Test Kit Aquarium - Nitrate PH KH Nitrite Tropical Fish Tank

API 800 Test Freshwater Aquarium Water Master Test Kit Free and Fast Delivery...

Envii Pond Parameter Treatment - Test, Monitor & Correct Pond Water pH & Nitrate

API & NT Labs Compatible Aquarium Test Tube Holder – 5 Slot Test Kit Stand

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

Tetra Nitrite Test Kit for Ponds and Aquariums

Water Testing Strips Kit Nitrate Nitrite Total Hardness Total Alkalinity pH x 5

SimplexHealth Nitrate & Nitrite Water Test (50 strips)

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

Aquarium Test Tube Holder Rack Tropical / Pond Fish NT Labs Kit Stand Station

Tetra 6in1 Aquarium Test Kit Tropical PH KH GH NO2 NO3 Chlorine 25 Strips

NT Labs Multi Test Lab For Aquarium NH4 NO2 NO3 PH GH KH Fish Tank Test Kit

API Saltwater Master Test Kit exp 03/26

SimplexHealth Nitrate & Nitrite Water Test (50 strips)

Aquaforest Test Pro Kit Alkalinity Ca Mg Nitrate Phosphate Aquarium Fish Tank

JBL PROSCAN WATER ANALYSIS KIT & RECHARGE REFILL TEST SMARTPHONE AQUARIUM TANK

API Pond 5 in 1 Test Strips Pack Of 4 - Garden Pond Water Test Kit Fish Health

API NITRATE TEST KIT TROPICAL COLDWATER AND MARINE FISH TANK AQUARIUM

Salifert Magnesium MG & Calcium CA Profi Test Kit Marine Fish Tank Reef Aquarium

NT LABS MARINE LAB TEST KITS TESTING KITS SALTWATER FISH AQUARIUM TEST

NT LABS MARINE MULTI AND REEF TEST KITS FOR AQUARIUM FISH TANKS TESTING KITS

NT Labs Test Kit Aquarium Fish Tank Tropical Freshwater Lab Testing pH & More

5 in1 Aquarium Water Test Kit, Fish Tank Tester Strips (50-200 Strips) Bulk UK

100pcs 16 IN 1 Drinking Water Test Strips For Home Well Water Quality Testing

Best selling

NT Labs Aquarium Lab Multi-test Kit - NTLABS

NT Labs Pondlab 200 Pond Water Parameter Test Kit (026322)

API 164M Pond Care Master Test Kit

API Freshwater Master Test Kit pH No2 Tropical Fish Tank

API 5 in 1 Aquarium Test Kit - 4 Pack

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

Tetra Pond Test Strip 6 in 1 (T6912)

API LR1800 Nitrate Aquarium Fish Tank Fresh and Salt Water Test Kit - 90 Tests

Top-rated

API Freshwater Master Test Kit pH No2 Tropical Fish Tank

NT Labs Aquarium Lab Multi-test Kit - NTLABS

Tetra Test 6in1 Strips Aquarium to Test 6 Essential Water Quality Parameters - Pack of 25

NT Labs Pondlab 200 Pond Water Parameter Test Kit (026322)

API 55898 5 in 1 Aquarium Test Strips - Pack of 25

API 164M Pond Care Master Test Kit

API Saltwater Master Test Kit