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Best selling products: Best Alkalinity/KH Fresh Water Aquarium Test Kits

Best-sellingHighest-rated products
Tetra Aquasafe Water Conditioner 5 Litre
Rank 1
Tetra Aquasafe Water Conditioner 5 Litre
(101)
£28.95 New
£19.34 Used
Tetra Aquasafe Aquarium Tap Water Conditioner- 500ml
Rank 2
Tetra Aquasafe Aquarium Tap Water Conditioner- 500ml
(217)
£10.90 New
No used products available
Seachem Prime Water Conditioner - 325 ml
Rank 3
Seachem Prime Water Conditioner - 325 ml
(21)
£13.20 New
No used products available
Seachem Prime 500ml Dechlorinator Ammonia Nitrate Remover
Rank 4
Seachem Prime 500ml Dechlorinator Ammonia Nitrate Remover
(166)
£21.39 New
No used products available
Seachem Prime 0436 250ml Fish Tank Dechlorinator
Rank 5
Seachem Prime 0436 250ml Fish Tank Dechlorinator
(55)
£13.29 New
No used products available
AQUARIAN Tap Water Safe Aquarium Water Conditioner - 118 ml
Rank 6
AQUARIAN Tap Water Safe Aquarium Water Conditioner - 118 ml
(59)
£3.15 New
No used products available
Seachem Prime Water Conditioner 100 Ml 1 White
Rank 7
Seachem Prime Water Conditioner 100 Ml 1 White
(63)
£9.24 New
No used products available
Tetra Aquasafe 250 ml Aquarium Water Treatment
Rank 8
Tetra Aquasafe 250 ml Aquarium Water Treatment
(58)
£5.42 New
£2.27 Used
Seachem Purigen Ultimate Filtration for Freshwater Aquariums - 100ml
Rank 9
Seachem Purigen Ultimate Filtration for Freshwater Aquariums - 100ml
(15)
£13.15 New
No used products available
Interpet Bioactive Tapsafe - 500ml
Rank 10
Interpet Bioactive Tapsafe - 500ml
(169)
£4.70 New
No used products available
NT Labs Aquarium Lab Multi-test Kit - NTLABS
Rank 11
NT Labs Aquarium Lab Multi-test Kit - NTLABS
(232)
£24.99 New
No used products available
Tetra AquaSafe Plus Water Conditioner - 100 ml (T113)
Rank 12
Tetra AquaSafe Plus Water Conditioner - 100 ml (T113)
(43)
£4.60 New
No used products available
Seachem Prime Concentrated Conditioner - 1L (437)
Rank 13
Seachem Prime Concentrated Conditioner - 1L (437)
(3)
£37.34 New
No used products available
Fluval Aquaplus 21700g Water Conditioner - A8345A2
Rank 14
Fluval Aquaplus 21700g Water Conditioner - A8345A2
(26)
£21.79 New
No used products available
Evolution Aqua Pure Aquarium 50 Clear Gel Balls (21900)
Rank 15
Evolution Aqua Pure Aquarium 50 Clear Gel Balls (21900)
(285)
£9.90 New
No used products available
API Freshwater Master Test Kit pH No2 Tropical Fish Tank
Rank 16
API Freshwater Master Test Kit pH No2 Tropical Fish Tank
(243)
£29.99 New
No used products available
Seachem Prime Fresh and Saltwater Conditioner 100ml
Rank 17
Seachem Prime Fresh and Saltwater Conditioner 100ml
(29)
£6.75 New
No used products available
Seachem Prime Concentrated 4L Aquarium Water Conditioner
Rank 18
Seachem Prime Concentrated 4L Aquarium Water Conditioner
(5)
£124.99 New
No used products available
SimplexHealth Total Hardness Water Test Strips - Pack of 10
Rank 19
SimplexHealth Total Hardness Water Test Strips - Pack of 10
(83)
£3.99 New
No used products available
API Prevent Aquarium Algae Control Solution - 237ml
Rank 20
API Prevent Aquarium Algae Control Solution - 237ml
(41)
£9.29 New
£8.64 Used
Interpet Bioactive Tapsafe Aquarium Water Dechlorinator - 250ml (0557)
Rank 21
Interpet Bioactive Tapsafe Aquarium Water Dechlorinator - 250ml (0557)
(34)
£9.50 New
No used products available
API 164M Pond Care Master Test Kit
Rank 22
API 164M Pond Care Master Test Kit
(72)
£24.79 New
No used products available
Aquarium Systems Instant Ocean Salt 4kg/120L
Rank 23
Aquarium Systems Instant Ocean Salt 4kg/120L
(13)
£18.99 New
No used products available
API GH & KH TEST KIT Freshwater Aquarium Water Test Kit
Rank 24
API GH & KH TEST KIT Freshwater Aquarium Water Test Kit
(8)
£11.49 New
No used products available
TAP Aquarium Doctor Snail Control - 125ml
Rank 25
TAP Aquarium Doctor Snail Control - 125ml
(66)
£5.49 New
No used products available
API 55898 5 in 1 Aquarium Test Strips - Pack of 25
Rank 26
API 55898 5 in 1 Aquarium Test Strips - Pack of 25
(73)
£4.90 New
No used products available
API STRESS COAT Aquarium Water Conditioner - 473ml
Rank 27
API STRESS COAT Aquarium Water Conditioner - 473ml
(45)
£13.35 New
No used products available
Tetra AlguMin Algae Control Treatment - 250ml
Rank 28
Tetra AlguMin Algae Control Treatment - 250ml
(9)
£8.18 New
No used products available
API LR8600 Ammonia Test Kit for Aquarium - Pack of 130 Tests
Rank 29
API LR8600 Ammonia Test Kit for Aquarium - Pack of 130 Tests
(56)
£8.64 New
No used products available
API Aqua Essential Aquarium Water Conditioner 473 Ml Bottle
Rank 30
API Aqua Essential Aquarium Water Conditioner 473 Ml Bottle
(2)
£11.89 New
No used products available
Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank
Rank 31
Salifert MG Profi Test Kit Magnesium 50 Tests Marine Aquarium Fish Tank
(31)
£11.79 New
£9.56 Used
API 5 in 1 Aquarium Test Kit - 4 Pack
Rank 32
API 5 in 1 Aquarium Test Kit - 4 Pack
(46)
£4.45 New
No used products available
API Phosphate Test Kit - Tropical Coldwater and Marines Fish Tank Aquarium
Rank 33
API Phosphate Test Kit - Tropical Coldwater and Marines Fish Tank Aquarium
(27)
£11.90 New
£10.78 Used
Salifert 22040 Test Kit
Rank 34
Salifert 22040 Test Kit
(9)
£13.40 New
£8.00 Used
EasyLife AlgExit 500ml Algae Control
Rank 35
EasyLife AlgExit 500ml Algae Control
(44)
£10.72 New
No used products available
Tetra Pond Test Strip 6 in 1 (T6912)
Rank 36
Tetra Pond Test Strip 6 in 1 (T6912)
(118)
£12.95 New
No used products available
EasyLife AlgExit 0.25L Fish Tank Algae Removal - ALG0250
Rank 37
EasyLife AlgExit 0.25L Fish Tank Algae Removal - ALG0250
(45)
£8.01 New
No used products available
Seachem Flourish Tabs for Planted Aquarium - 40 Tabs
Rank 38
Seachem Flourish Tabs for Planted Aquarium - 40 Tabs
(7)
£27.94 New
No used products available
Seachem Ammonia Alert for Freshwater and Marine Water
Rank 39
Seachem Ammonia Alert for Freshwater and Marine Water
(98)
£10.85 New
No used products available
API Melafix - 473ml
Rank 40
API Melafix - 473ml
(20)
£10.78 New
No used products available
API LR1800 Nitrate Aquarium Fish Tank Fresh and Salt Water Test Kit - 90 Tests
Rank 41
API LR1800 Nitrate Aquarium Fish Tank Fresh and Salt Water Test Kit - 90 Tests
(33)
£11.90 New
No used products available
Fluval Aqua Plus Water Conditioner for Aquariums - 250ml
Rank 42
Fluval Aqua Plus Water Conditioner for Aquariums - 250ml
(78)
£9.95 New
No used products available
Seachem Clarity Water Conditioner - 250ml
Rank 43
Seachem Clarity Water Conditioner - 250ml
(19)
£11.95 New
No used products available
Seachem Stability Tank Stabilization System - 500ml
Rank 44
Seachem Stability Tank Stabilization System - 500ml
(28)
£21.20 New
No used products available
Fluval Cycle Biological Enhancer - 375ml
Rank 45
Fluval Cycle Biological Enhancer - 375ml
(41)
£10.49 New
No used products available
API ACCU-CLEAR Aquarium Cloudy Water Clarifier - 118ml
Rank 46
API ACCU-CLEAR Aquarium Cloudy Water Clarifier - 118ml
(72)
£6.50 New
No used products available
Tetra AlguMin 100ml Dual Action Algae Treatment for Aquariums
Rank 47
Tetra AlguMin 100ml Dual Action Algae Treatment for Aquariums
(15)
£7.49 New
No used products available
API LEAF ZONE Aquarium Plant Fertiliser - 473ml (576J)
Rank 48
API LEAF ZONE Aquarium Plant Fertiliser - 473ml (576J)
(32)
£13.29 New
No used products available
Salifert KH/Alkalinity Test Kit
Rank 49
Salifert KH/Alkalinity Test Kit
(13)
£10.65 New
£5.43 Used
Fluval A8344A1 Water Conditioner for Aquariums 500ml
Rank 50
Fluval A8344A1 Water Conditioner for Aquariums 500ml
(54)
£12.49 New
No used products available
API Stress Coat Tap Water Aquarium Treatment 240ml 85a
Rank 51
API Stress Coat Tap Water Aquarium Treatment 240ml 85a
(25)
£6.49 New
No used products available
Salifert Nitrate Profi Test Kit Marine Reef Fish
Rank 52
Salifert Nitrate Profi Test Kit Marine Reef Fish
(15)
£12.45 New
£8.64 Used
Colombo Testlab Pond Test Kit
Rank 53
Colombo Testlab Pond Test Kit
(38)
£39.95 New
No used products available
Seachem Purigen 25ml in Small Filter Bag Postage
Rank 54
Seachem Purigen 25ml in Small Filter Bag Postage
£245.95 New
No used products available
Vetark Fluke-Solve Aquarium Treatment - 100g
Rank 55
Vetark Fluke-Solve Aquarium Treatment - 100g
(31)
£44.30 New
No used products available
Seachem SC-120 Stability Fish Tank Treatment - White
Rank 56
Seachem SC-120 Stability Fish Tank Treatment - White
(14)
£13.25 New
No used products available
Easy Life ProFito 500ml Complete Aquatic Plant Fertilizer Aquarium Fish Tank X2
Rank 57
Easy Life ProFito 500ml Complete Aquatic Plant Fertilizer Aquarium Fish Tank X2
(62)
£9.28 New
No used products available
API Saltwater Master Test Kit
Rank 58
API Saltwater Master Test Kit
(69)
£18.27 New
No used products available
Tetra Crystal Water Clarifier - 250ml
Rank 59
Tetra Crystal Water Clarifier - 250ml
(62)
£12.26 New
No used products available
API White Spot Cure for Fish Tank - 118ml
Rank 60
API White Spot Cure for Fish Tank - 118ml
(35)
£8.49 New
No used products available
Fluval A8351A1 Water Treatment - ‎500 ml
Rank 61
Fluval A8351A1 Water Treatment - ‎500 ml
(41)
£16.49 New
No used products available
All Pond Solutions Aquarium Rescue Snail Control 100 Ml
Rank 62
All Pond Solutions Aquarium Rescue Snail Control 100 Ml
(16)
£10.99 New
No used products available
NT Labs Aquarium Water pH Test Kit - 120 Count
Rank 63
NT Labs Aquarium Water pH Test Kit - 120 Count
(68)
£12.99 New
No used products available
Tetra AquaSafe Fish Tank Water Conditioner - 50ml
Rank 64
Tetra AquaSafe Fish Tank Water Conditioner - 50ml
(82)
£4.79 New
No used products available
Tétra 6 in 1 Tropical Ph KH GH No2 No3 Cl3 Aquarium Water Test Kit
Rank 65
Tétra 6 in 1 Tropical Ph KH GH No2 No3 Cl3 Aquarium Water Test Kit
(25)
£6.25 New
No used products available
NT Labs Marine Lab Multi Test Kit Reef KH MG Ca Po4 Aquarium Tank
Rank 66
NT Labs Marine Lab Multi Test Kit Reef KH MG Ca Po4 Aquarium Tank
£26.95 New
No used products available
Fluval Aquaplus 2L Water Conditioner
Rank 67
Fluval Aquaplus 2L Water Conditioner
(119)
£21.99 New
No used products available
Easy Life EasyCarbo 1000 Ml 1 LT Carbon Source Fertilizer for Aquarium Plants
Rank 68
Easy Life EasyCarbo 1000 Ml 1 LT Carbon Source Fertilizer for Aquarium Plants
(56)
£15.82 New
No used products available
API KH Test Kit Carbonate Hardness Fish Tank Aquarium Tropical Coldwater & Pond
Rank 69
API KH Test Kit Carbonate Hardness Fish Tank Aquarium Tropical Coldwater & Pond
(9)
£8.49 New
No used products available
API AQUARIAN Tap Water Safe 473ml White
Rank 70
API AQUARIAN Tap Water Safe 473ml White
(4)
£11.50 New
No used products available
API Prevent Algae Liquid Aquarium Water Treatment 118ml
Rank 71
API Prevent Algae Liquid Aquarium Water Treatment 118ml
(53)
£7.15 New
No used products available
Tetra Crystal Water Treatment 100ml (551346)
Rank 72
Tetra Crystal Water Treatment 100ml (551346)
(51)
£8.84 New
No used products available
NT Labs Nitrate Test Kit Tropical Coldwater Pond Fish Tank Aquarium No3 Testing
Rank 73
NT Labs Nitrate Test Kit Tropical Coldwater Pond Fish Tank Aquarium No3 Testing
(6)
£8.25 New
No used products available
API Stress Coat 118ml Tap Water Conditioner Fish Tank Dechlorinator
Rank 74
API Stress Coat 118ml Tap Water Conditioner Fish Tank Dechlorinator
(13)
£7.99 New
No used products available
API Aquarium Tonic Salt 454g Tropical Fish Medication
Rank 75
API Aquarium Tonic Salt 454g Tropical Fish Medication
(21)
£6.45 New
No used products available
Tropic Marin Pro Reef Sea Salt 10kg/300L Bucket
Rank 76
Tropic Marin Pro Reef Sea Salt 10kg/300L Bucket
(3)
£51.95 New
No used products available
API Ammonia Test Strip - Pack of 25
Rank 77
API Ammonia Test Strip - Pack of 25
(5)
£10.40 New
No used products available
- Interpet Quick Clear Aquarium Treatment 125 Ml 0755349551095
Rank 78
- Interpet Quick Clear Aquarium Treatment 125 Ml 0755349551095
(20)
£6.57 New
No used products available
Seachem Flourish Tabs Gravel Bed Supplement - 10 Tablets
Rank 79
Seachem Flourish Tabs Gravel Bed Supplement - 10 Tablets
(8)
£11.85 New
No used products available
eSHa GASTROPEX 10ml Aquarium Fish Tank Snail Killer Treatment
Rank 80
eSHa GASTROPEX 10ml Aquarium Fish Tank Snail Killer Treatment
(361)
£8.19 New
No used products available
Interpet Quick Safe Start 50ml for Coldwater & Tropical Aquariums 0755349551026
Rank 81
Interpet Quick Safe Start 50ml for Coldwater & Tropical Aquariums 0755349551026
(20)
£2.99 New
No used products available
API Quick Start Freshwater and Saltwater Aquarium Nitrifying Bacteria - 473 ml
Rank 82
API Quick Start Freshwater and Saltwater Aquarium Nitrifying Bacteria - 473 ml
(6)
£12.99 New
No used products available
Seachem Flourish Excel Plant Fertilizer - 250ml
Rank 83
Seachem Flourish Excel Plant Fertilizer - 250ml
(15)
£10.94 New
No used products available
Evolution Aqua Pure Reef Balance 60 Balls
Rank 84
Evolution Aqua Pure Reef Balance 60 Balls
(23)
£10.78 New
No used products available
Seachem 250g Safe Water Conditioner - White
Rank 85
Seachem 250g Safe Water Conditioner - White
(22)
£17.54 New
No used products available
EasyLife EasyCarbo Aquarium Liquid Carbon Fertilizer 500ml (EC1002)
Rank 86
EasyLife EasyCarbo Aquarium Liquid Carbon Fertilizer 500ml (EC1002)
(65)
£10.45 New
No used products available
API Marine Reef Master Aquarium Test Kit Ca2 KH Po4 No3
Rank 87
API Marine Reef Master Aquarium Test Kit Ca2 KH Po4 No3
(7)
£27.49 New
No used products available
Seachem PhosGuard Phosphate and Silicate Remover 4 Litre
Rank 88
Seachem PhosGuard Phosphate and Silicate Remover 4 Litre
(1)
£107.95 New
No used products available
eSHa 2000 Finrot & Bacteria Water Additive - 180 ml
Rank 89
eSHa 2000 Finrot & Bacteria Water Additive - 180 ml
(4)
£36.99 New
No used products available
Interpet Aquarium 125 ml Green Away - 55114
Rank 90
Interpet Aquarium 125 ml Green Away - 55114
(43)
£6.11 New
No used products available
Tropica Specialised Nutrition Plant Care Fertiliser - 750ml (For 6000 L)
Rank 91
Tropica Specialised Nutrition Plant Care Fertiliser - 750ml (For 6000 L)
(3)
£19.80 New
No used products available
Fluval Biological Enhancer For Aquariums - 2L
Rank 92
Fluval Biological Enhancer For Aquariums - 2L
(7)
£39.95 New
No used products available
Seachem Stability 1l Fish Tank Treatment
Rank 93
Seachem Stability 1l Fish Tank Treatment
(2)
£37.99 New
No used products available
eSHa Optima 20ml Fish Health Boost Aquarium Water Treatment
Rank 94
eSHa Optima 20ml Fish Health Boost Aquarium Water Treatment
(25)
£6.99 New
No used products available
API Pimafix Antifungal Freshwater and Saltwater Fish Remedy 237 Ml Bottle
Rank 95
API Pimafix Antifungal Freshwater and Saltwater Fish Remedy 237 Ml Bottle
(24)
£13.99 New
No used products available
eSHa PROTALON 707 20ml Anti Algae Treatment Plant Friendly
Rank 96
eSHa PROTALON 707 20ml Anti Algae Treatment Plant Friendly
(42)
£8.99 New
No used products available
Tropica Nutrition Capsules 10 Pcs Plant Fertiliser Water Aquarium Fish Tank X 2
Rank 97
Tropica Nutrition Capsules 10 Pcs Plant Fertiliser Water Aquarium Fish Tank X 2
(5)
£5.99 New
No used products available
Seachem Stability Tank Stabilization System - 100ml
Rank 98
Seachem Stability Tank Stabilization System - 100ml
(8)
£6.99 New
No used products available
Interpet 573 Aquarium Swimbladder Treatment - Orange
Rank 99
Interpet 573 Aquarium Swimbladder Treatment - Orange
(23)
£7.95 New
No used products available
Interpet Anti Hair Algae Aquarium Water Treatments 125 Ml Pr200 011
Rank 100
Interpet Anti Hair Algae Aquarium Water Treatments 125 Ml Pr200 011
(24)
£5.53 New
No used products available