Fish and Aquarium pH Level Water Tests and Treatment

1,499 results

Botanical Box - Leaves/Pods for Aquarium Betta Shrimp Pleco Blackwater Tannin
Brand new · Unbranded
£8.99 to £89.99
(£59.99/Unit)
Free postage
Click & Collect
6-in-1 FISH TANK TEST STRIPS MARINE TROPICAL AQUARIUM TEST STRIPS 100pcs IN-326
Brand new
£7.95
Free postage
Click & Collect
382 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
411 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
1,192 sold
NT LABS POND LAB 200 MULTI TEST KIT MASTER PONDLAB WATER SET PH GH KH NO2 NO4
Brand new · NT Labs
(116)
£24.49
Free postage
Click & Collect
2,688 sold
XL Indian Almond Leaves for Aquaria Catappa Betta Shrimp Pleco Blackwater Tannin
Brand new · Unbranded
£3.99 to £159.99
(£159.99/Unit)
Free postage
NT LABS AQUARIUM LAB MULTI-TEST MASTER KIT WATER TESTING TROPICAL FISH TANK
Brand new
(221)
£24.99
Free postage
Click & Collect
7,227 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
64 sold
SALIFERT PROFI TEST KIT RANGE MARINE REEF SALTWATER CORAL AQUARIUM FISH TANK
Brand new · Salifert
(9)
£10.50 to £34.95
Free postage
Click & Collect
81 sold
Envii Pond Test Strips - Quick & Easy Test Kit Contains 25 Test Strips
Brand new
(8)
£11.95
Free postage
Click & Collect
663 sold
TETRA EASY BALANCE 100ml 250ml 500ml pH KH PHOSPHATE WATER BALANCE AQUARIUM
Brand new · Tétra
(12)
£7.75 to £14.95
Free postage
Click & Collect
229 sold
NT Labs Test Reagent Bottle Replacement Spare pH Nitrite GH Ammonia Fish Tank
Brand new
£3.19 to £29.99
Free postage
218 sold
Tetra Easy Balance Aquarium Fish Tank Treatment Stabilises pH kH Healthy Water
Brand new · Tétra
(9)
£6.95 to £9.90
Free postage
Click & Collect
425 sold
7 in1 Aquarium Test Kit, Fish Tank Water Testing (10-200x Tester Strips) Bulk UK
Bulk Value Option - UK Based - Free P&P RM48
Brand new
£3.95 to £14.95
Free postage
225 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
264 sold
Watersafe Drinking Water Test Kit for Well or Tap Water WS-425C
Brand new
£29.99
Free postage
Click & Collect
830 sold
NT Labs Foam Control Pond Treatment Foam Surface Protein Buildup Pond Problems
Brand new · NT Labs
(16)
£9.99 to £19.85
Free postage
Click & Collect
12 sold
Reef Zlements Two-Part Dosing Solution pH Plus 1000ml/2500ml/5000ml 10000ml set
Brand new
£29.99 to £129.99
Free postage
Click & Collect
TETRA POND STRIPS 6 IN 1 QUICK TEST KIT KOI FISH WATER QUALITY QUICK TETRAPOND
Brand new · Tétra
(116)
£12.99
Free postage
Click & Collect
2,241 sold
Reef Zlements Macro Element Mg CA Marine Additives Reef Coral Growth Colour
Brand new
£20.99 to £21.99
Free postage
Click & Collect
SEACHEM ALERT AMMONIA Ph COMBO MONITOR CONTINUOUS WATER TEST AQUARIUM FISH TANK
Brand new · Seachem
(67)
£13.95
Free postage
Click & Collect
Only 1 left.
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
19 sold
Seachem Alkaline Buffer pH Raise KH / Alkalinity Freshwater Aquarium Fish Tank
Brand new · Seachem
(1)
£8.99 to £12.50
Free postage
Click & Collect
83 sold
NT LABS TEST KITS TROPICAL/COLDWATER AQUARIUM LAB WATER TESTING FISH TANK
Brand new
(4)
£8.25 to £24.99
Free postage
Click & Collect
494 sold
Water Testing Strips Kit Nitrate Nitrite Total Hardness Total Alkalinity pH x 5
Brand new
(6)
£3.99
Free postage
811 sold
Seneye Slide Packs pH/NH3 Ammonia Replacement 3/6/12 Months Fish Tank Pond Reef
Brand new
£31.99 to £114.95
Free postage
Click & Collect
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
434 sold
Nt Labs Aquarium Labs Testing Kits Tropical Cold Water Pond Fish Tank Multi Test
Brand new
(221)
£8.25 to £24.65
Free postage
Click & Collect
73 sold
Fluid Filter Medium 1000ml - Aquarium Fish Tank Conditioner - Tap Safe Treatment
Brand new
£14.99
Free postage
Click & Collect
53 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
Only 3 left
Tetra Pond Water Stabiliser 1.2kg PH KH Carbonate Hardness Health
Brand new · Tétra
(4)
£16.95
Free postage
Click & Collect
63 sold
Hot Tub Chlorine Dip Test Strips SPA Swimming Pool PH Alkaline Tester Paper X25
Brand new
(2)
£4.49
(£0.18/Unit)
Free postage
184 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
1,824 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
597 sold
Alkaline pH Test Litmus Paper Strips 0 - 14 for Water Urine & Saliva 5M Roll
Brand new · Simplex Health
(13)
£4.99
Free postage
1,091 sold
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
1,082 sold
API 5 in 1 AQUARIUM WATER TEST KIT DIP 25 STRIPS FRESHWATER SALTWATER FISH TANK
Brand new · API
(73)
£5.49 to £12.99
Free postage
Click & Collect
687 sold
JBL PROSCAN RECHARGE WATER-ANALYSIS STRIPS FOR SMARTPHONE APP AQUARIUM FISH TANK
Brand new · JBL
(31)
£14.75
Free postage
Click & Collect
507 sold
Colombo Aqua Test Lab Aquarium Pond Marine Fish Tank Muti Test Kit 7 Parameters
Brand new · Colombo
(38)
£38.99
Free postage
Click & Collect
Only 1 left.
100Pcs 16 IN 1 Drinking Water Test Strips Water Test Kit For Home Water Testing
Brand new · Unbranded
£13.95
Free postage
NT Labs PondLab Test Kit - Pond Multitest Water Test PH, GH, KH, N03, NO4, NH4
Brand new · NT Labs
(116)
£24.49
Free postage
Click & Collect
229 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
1,075 sold
COLOMBO AQUATEST TEST LAB PROFESSIONAL POND FRESH SEA WATER MARINE TEST KIT FISH
Brand new · Colombo
(38)
£38.95
Free postage
Click & Collect
JBL TestLab & TestLab Marin Aquarium Fish Tank Multi Test Kit Freshwater & Marin
Brand new · JBL
(4)
£83.53 to £87.90
Free postage
Click & Collect
77 sold
NT Labs Aquarium Fish Tank Tests Kit Ammonia Nitrite Nitrate PH GH KH Freshwater
Brand new
(2)
£7.99 to £9.95
Free postage
Tetra 6in1 Aquarium Test Kit Tropical PH KH GH NO2 NO3 Chlorine 25 Strips
Brand new · Tétra
(25)
£9.99
Free postage
Click & Collect
23 sold
NT Labs Multi Test Lab For Aquarium NH4 NO2 NO3 PH GH KH Fish Tank Test Kit
Brand new
(221)
£24.65
Free postage
Click & Collect
131 sold
API MASTER TEST KITS FRESH WATER MARINE REEF SALTWATER STRIPS WATER FISH TANK
Brand new · API
(7)
£12.99 to £32.99
Free postage
Click & Collect
170 sold
API 5ml Test Tubes Spare for Test Kit with Caps Replacement Aquarium Fish Tank
Brand new · API
(2)
£4.05 to £21.95
Free postage
83 sold
SEACHEM NEUTRAL REGULATOR pH 7.0 FROM HIGH/LOW ACID ALKALI AQUARIUM FISH TANK
Brand new · Seachem
(3)
£8.20 to £19.50
Free postage
Click & Collect
139 sold
API Carbonate Hardness Test Kit for Freshwater & Saltwater Aquarium Test Kit
Fast & Free Delivery On All Items | Multibuy Savings
Brand new · API
(9)
£8.99
(£8.99/Unit)
Free postage
Click & Collect
60 sold
Aquarium Test Kit Tetra Fish Tank Water 6in1 Tropical PH KH GH NO2 NO3 Chlorine
Brand new · Tétra
(25)
£7.49 to £16.99
Free postage
Click & Collect
142 sold
80 Aquarium Fish Tank Water Test Strips Easy Pond Water Quality Testing Kit
Brand new · Unbranded
£2.28
Free postage
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
400 sold
WATERLIFE BUFFER 6.5, 7.2, 8.3 RAISES OR LOWERS PH TROPICAL SALTWATER FISH TANK
Brand new · Waterlife
(10)
£9.80 to £9.99
Free postage
Click & Collect
API Test Kits Aquarium Water Testing pH NO2 NO3 Liquid Strips Master Fresh Marin
Brand new · API
(33)
£6.79 to £35.96
Free postage
Click & Collect
Aquacadabra Chlorine Pond & Swimming Pool Ph Hardness Water Test Kits 50 Strips
Brand new
£7.99 to £9.99
Free postage
Click & Collect
BLAGDON WATER QUALITY POND DIP TEST KIT 60 TESTS Ph Ammonia Nitrite Nitate GH KH
Brand new · Interpet
(3)
£14.65
Free postage
Click & Collect
39 sold
Fluid Filter Medium 5000ml - Aquarium Fish Tank Conditioner - Tap Safe Treatment
Brand new
£34.99
Free postage
Click & Collect
37 sold
Aquarium Test Kit Holder rack tropical marine salt water nitrate (KIT NOT INC)
Brand new
£9.99 to £11.99
Free postage
Click & Collect
125 sold

Best selling

See all

NT Labs Pondlab 200 Pond Water Parameter Test Kit (026322)
(116)
£24.49 New
NT Labs Aquarium Lab Multi-test Kit - NTLABS
(221)
£24.65 New
API Freshwater Master Test Kit pH No2 Tropical Fish Tank
(243)
£29.99 New
£19.95 Used
API 164M Pond Care Master Test Kit
(72)
£24.79 New
API 5 in 1 Aquarium Test Kit - 4 Pack
(46)
£4.45 New
Tetra Pond Test Strip 6 in 1 (T6912)
(116)
£12.95 New
Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank
(31)
£11.79 New
Salifert Phosphate Test Kit Phosphate 60 Tests For Aquarium
(9)
£11.49 New

Top-rated

See all

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

98% agree - Would recommend
£29.99 New
£19.95 Used
NT Labs Aquarium Lab Multi-test Kit - NTLABS
(221)

98% agree - Would recommend
£24.65 New
Tetra Test 6in1 Strips Aquarium to Test 6 Essential Water Quality Parameters - Pack of 25
(144)

100% agree - Would recommend
£6.99 New
API 55898 5 in 1 Aquarium Test Strips - Pack of 25
(73)

100% agree - Would recommend
£4.50 New
NT Labs Aquarium Water pH Test Kit - 120 Count
(68)

100% agree - Would recommend
£10.69 New
Colombo Testlab Pond Test Kit
(38)

88% agree - Would recommend
£38.95 New
JBL ProScan Recharge Aquarium Test Strips Refill - 24 Count (2542100)
(31)

96% agree - Would recommend
£14.75 New
Tetra Easy Balance Water Conditioner - 500ml
(28)

100% agree - Would recommend
£6.20 New

Brand

Water Type

Fish and Aquarium pH Level Water Tests and Treatment

Shop by category

1,499 results

Botanical Box - Leaves/Pods for Aquarium Betta Shrimp Pleco Blackwater Tannin

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

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

XL Indian Almond Leaves for Aquaria Catappa Betta Shrimp Pleco Blackwater Tannin

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

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

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

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

TETRA EASY BALANCE 100ml 250ml 500ml pH KH PHOSPHATE WATER BALANCE AQUARIUM

NT Labs Test Reagent Bottle Replacement Spare pH Nitrite GH Ammonia Fish Tank

Tetra Easy Balance Aquarium Fish Tank Treatment Stabilises pH kH Healthy Water

7 in1 Aquarium Test Kit, Fish Tank Water Testing (10-200x Tester Strips) Bulk UK

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

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

NT Labs Foam Control Pond Treatment Foam Surface Protein Buildup Pond Problems

Reef Zlements Two-Part Dosing Solution pH Plus 1000ml/2500ml/5000ml 10000ml set

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

Reef Zlements Macro Element Mg CA Marine Additives Reef Coral Growth Colour

SEACHEM ALERT AMMONIA Ph COMBO MONITOR CONTINUOUS WATER TEST AQUARIUM FISH TANK

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

Seachem Alkaline Buffer pH Raise KH / Alkalinity Freshwater Aquarium Fish Tank

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

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

Seneye Slide Packs pH/NH3 Ammonia Replacement 3/6/12 Months Fish Tank Pond Reef

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

Nt Labs Aquarium Labs Testing Kits Tropical Cold Water Pond Fish Tank Multi Test

Fluid Filter Medium 1000ml - Aquarium Fish Tank Conditioner - Tap Safe Treatment

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

Tetra Pond Water Stabiliser 1.2kg PH KH Carbonate Hardness Health

Hot Tub Chlorine Dip Test Strips SPA Swimming Pool PH Alkaline Tester Paper X25

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

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

Alkaline pH Test Litmus Paper Strips 0 - 14 for Water Urine & Saliva 5M Roll

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

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

JBL PROSCAN RECHARGE WATER-ANALYSIS STRIPS FOR SMARTPHONE APP AQUARIUM FISH TANK

Colombo Aqua Test Lab Aquarium Pond Marine Fish Tank Muti Test Kit 7 Parameters

100Pcs 16 IN 1 Drinking Water Test Strips Water Test Kit For Home Water Testing

NT Labs PondLab Test Kit - Pond Multitest Water Test PH, GH, KH, N03, NO4, NH4

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

COLOMBO AQUATEST TEST LAB PROFESSIONAL POND FRESH SEA WATER MARINE TEST KIT FISH

JBL TestLab & TestLab Marin Aquarium Fish Tank Multi Test Kit Freshwater & Marin

NT Labs Aquarium Fish Tank Tests Kit Ammonia Nitrite Nitrate PH GH KH Freshwater

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

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

SEACHEM NEUTRAL REGULATOR pH 7.0 FROM HIGH/LOW ACID ALKALI AQUARIUM FISH TANK

API Carbonate Hardness Test Kit for Freshwater & Saltwater Aquarium Test Kit

Aquarium Test Kit Tetra Fish Tank Water 6in1 Tropical PH KH GH NO2 NO3 Chlorine

80 Aquarium Fish Tank Water Test Strips Easy Pond Water Quality Testing Kit

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

WATERLIFE BUFFER 6.5, 7.2, 8.3 RAISES OR LOWERS PH TROPICAL SALTWATER FISH TANK

API Test Kits Aquarium Water Testing pH NO2 NO3 Liquid Strips Master Fresh Marin

Aquacadabra Chlorine Pond & Swimming Pool Ph Hardness Water Test Kits 50 Strips

BLAGDON WATER QUALITY POND DIP TEST KIT 60 TESTS Ph Ammonia Nitrite Nitate GH KH

Fluid Filter Medium 5000ml - Aquarium Fish Tank Conditioner - Tap Safe Treatment

Aquarium Test Kit Holder rack tropical marine salt water nitrate (KIT NOT INC)

Best selling

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

NT Labs Aquarium Lab Multi-test Kit - NTLABS

API Freshwater Master Test Kit pH No2 Tropical Fish Tank

API 164M Pond Care Master Test Kit

API 5 in 1 Aquarium Test Kit - 4 Pack

Tetra Pond Test Strip 6 in 1 (T6912)

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

Salifert Phosphate Test Kit Phosphate 60 Tests For Aquarium

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

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

NT Labs Aquarium Water pH Test Kit - 120 Count

Colombo Testlab Pond Test Kit

JBL ProScan Recharge Aquarium Test Strips Refill - 24 Count (2542100)