Aquarium & Fish Tank Water Care

Sort
Filter

Salifert Aquarium Nitrite Test Kit

Rated 5 out of 5 stars
1
$10.39 Chewy Price
$11.86 List Price
$9.87 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 2 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 3 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 4 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 5 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 6 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 7 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 8 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 2 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 3 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 4 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 5 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 6 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 7 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 8 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 2 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 3 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 4 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 5 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 6 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 7 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 8 of 8
Slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 2 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 3 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 4 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 5 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 6 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 7 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 8 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 2 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 3 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 4 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 5 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 6 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 7 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 8 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 1 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 2 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 3 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 4 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 5 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 6 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 7 of 8
Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle slide 8 of 8

Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Saltwater Aquariums, 8-fl oz bottle

Rated 1.5 out of 5 stars
2
$18.10 Chewy Price
($2.27/fl oz) Price per Unit
$26.99 List Price
$17.20 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Slide 1 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 1 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 2 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 3 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 4 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 5 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 6 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 1 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 2 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 3 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 4 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 5 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 6 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 1 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 2 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 3 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 4 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 5 of 6
API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle slide 6 of 6

API Proper pH 6.5 Aquarium Water Treatment, 8.5-oz bottle

Rated 5 out of 5 stars
5
$11.57 Chewy Price
($1.37/oz) Price per Unit
$15.78 List Price
$10.99 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Slide 1 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 1 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 2 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 3 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 4 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 5 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 1 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 2 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 3 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 4 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 5 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 1 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 2 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 3 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 4 of 5
SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detoxify Fish Tank Ammonia Remover, 6.7-oz bottle slide 5 of 5

SunGrow Tap Water Conditioner with Beneficial Bacteria for Freshwater Aquarium Treatments Detox...

Rated 4.5 out of 5 stars
16
$5.93 Chewy Price
($0.89/oz) Price per Unit
$9.99 List Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Pond Algaefix Algae Control Solution, 1-gal bottle

Rated 4.4 out of 5 stars
434
$47.50 Chewy Price
($47.50/gl) Price per Unit
$96.98 List Price
$45.12 Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Fritz Aquarium Water Master Test Kit

Rated 3.7 out of 5 stars
6
$36.74 Chewy Price
$48.99 List Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Aqueon Shrimp Essentials Shrimp & Crayfish Freshwater Aquarium Trace Minerals, 4-fl oz bottle

Rated 4.7 out of 5 stars
29
$4.99 Chewy Price
($1.25/fl oz) Price per Unit
$9.99 List Price
$4.74 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Fluval Fresh & Salt pH High Range Fish Water Test Kit

Rated 4.5 out of 5 stars
2
$13.99 Chewy Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Microbe-Lift TheraP Aquarium Fish Water Treatment, 16-oz bottle

Rated 3.3 out of 5 stars
7
$16.64 Chewy Price
($1.04/oz) Price per Unit
$19.55 List Price
$15.81 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Python Multi Purpose Bio-Clean Aquarium Water Care, 1-fl oz bottle

Rated 4.7 out of 5 stars
9
$3.49 Chewy Price
($3.49/fl oz) Price per Unit
$3.32 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Nitrite NO2 Fresh & Salt Water Aquarium Test Kit, 180 count

Rated 5 out of 5 stars
6
$16.78 Chewy Price
($0.10/ea) Price per Unit
$15.94 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Instant Ocean Testing Hydrometer for Aquariums, 1 count

Rated 4 out of 5 stars
36
$11.99 Chewy Price
$13.69 List Price
$11.39 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Shrimp Water Conditioner, 32-fl oz bottle

$7.92 Chewy Price
($0.25/fl oz) Price per Unit
$8.99 List Price
$7.52 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Proper pH 7.5 Aquarium Water Treatment, 9.2-oz bottle

Rated 4.3 out of 5 stars
16
$12.95 Chewy Price
($1.41/oz) Price per Unit
$15.78 List Price
$12.30 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Reeflowers Goldfish Fish Aquarium Water Conditioner, 17-fl oz bottle

Rated 5 out of 5 stars
1
$16.63 Chewy Price
($0.98/fl oz) Price per Unit
$15.80 Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns

API Pond Accu-Clear Clarifier, 1-gal bottle

Rated 4.6 out of 5 stars
86
$57.00 Chewy Price
($57.00/gl) Price per Unit
$92.48 List Price
$54.15 Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Fritz Casuarina Cones, 20 count

Rated 1 out of 5 stars
1
$12.99 Chewy Price
($0.65/ea) Price per Unit
$14.99 List Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Kordon AmQuel Plus Ammonia Detoxifier Aquarium Water Conditioner, 8-oz bottle

Rated 4.6 out of 5 stars
12
$10.24 Chewy Price
($1.28/oz) Price per Unit
$9.73 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Fluval Nitrate Fish Water Test Kit

Rated 3.7 out of 5 stars
3
$22.99 Chewy Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Microbe-Lift Algaway 5.4 Algae Control Aquarium Algaecide, 16-oz bottle

Rated 4.1 out of 5 stars
14
$14.99 Chewy Price
($0.94/oz) Price per Unit
$14.24 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Stress Zyme Freshwater & Saltwater Aquarium Cleaning Solution, 32-fl oz bottle

Rated 4.9 out of 5 stars
14
$41.98 Chewy Price
($1.32/fl oz) Price per Unit
$39.88 Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

API Ammonia NH3/NH4 Freshwater & Saltwater Aquarium Test Strips, 25 count

Rated 4.3 out of 5 stars
12
$16.22 Chewy Price
($0.65/ea) Price per Unit
$23.98 List Price
$15.41 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aqueon Betta Bowl Plus Water Conditioner, 4-fl oz bottle

Rated 4.8 out of 5 stars
63
$6.99 Chewy Price
($1.75/fl oz) Price per Unit
$6.64 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics One & Only Live Nitrifying Bacteria for Saltwater Aquariums, 2-fl oz bottle

Rated 2.7 out of 5 stars
11
$19.20 Chewy Price
($9.60/fl oz) Price per Unit
$27.99 List Price
$18.24 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Pond Master Test Kit, 500 count

Rated 4.8 out of 5 stars
36
$30.14 Chewy Price
($0.07/ea) Price per Unit
$48.98 List Price
$28.63 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Boyd Chemi-Clean Red Cyanobacteria Aquarium Treatment, 2-g

Rated 4.8 out of 5 stars
20
$17.99 Chewy Price
($9.00/g) Price per Unit
$24.01 List Price
$17.09 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Pond Simply Clear Pond Water Clarifier, 64-fl oz bottle

Rated 4.3 out of 5 stars
95
$39.98 Chewy Price
($0.63/fl oz) Price per Unit
$76.98 List Price
$37.98 Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Fritz FritzGuard Aquarium Water Conditioner, 16-fl oz bottle

Rated 5 out of 5 stars
4
$10.39 Chewy Price
($0.65/fl oz) Price per Unit
$12.99 List Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Laguna Square Planting Basket, 12-in, 1 count

Rated 4.9 out of 5 stars
11
$6.99 Chewy Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Kordon Fish Protector Aquarium Water Conditioner, 16-fl oz bottle

Rated 4.6 out of 5 stars
7
$10.99 Chewy Price
($0.69/fl oz) Price per Unit
$10.44 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Microbe-Lift Goldfish Care Bowl Cleaner, 2-oz bottle

$4.95 Chewy Price
($2.48/oz) Price per Unit

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Python Multi Purpose Bio-Support Aquarium Water Care, 16.2-fl oz bottle

Rated 3.6 out of 5 stars
5
$12.10 Chewy Price
($0.75/fl oz) Price per Unit
$21.99 List Price
$11.50 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Copper Cu+ Freshwater & Saltwater Aquarium Test Kit, 90 count

Rated 4.3 out of 5 stars
4
$12.48 Chewy Price
($0.14/ea) Price per Unit
$17.48 List Price
$11.86 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aqueon AquaPacs Aquarium Water Conditioner, 12 pack, 10-gal

Rated 4.5 out of 5 stars
12
$13.99 Chewy Price
($0.12/gl) Price per Unit
$16.99 List Price
$13.29 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Shrimp One & Only Water Conditioner, 2-fl oz bottle

$13.41 Chewy Price
($6.71/fl oz) Price per Unit
$16.99 List Price
$12.74 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Marine Complete Trace Aquarium Water Conditioner, 16-oz bottle

Rated 3 out of 5 stars
4
$12.99 Chewy Price
($0.82/oz) Price per Unit
$18.28 List Price
$12.34 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Category

Aquarium & Fish Tank Water Conditioner

Filtration Bacteria

Aquarium & Fish Tank Algae Control & Water Clarifier

Aquarium & Fish Tank Plant Fertilizers

Aquarium & Fish Tank Salt

Aquarium & Fish Tank Water Clarifiers

Aquarium & Fish Tank Water Test Kits

Water Additive

Aquarium & Fish Tank Water Treatments

Therapeutic Salt

Save 5% on repeat deliveries

Water Test Type

Aquarium Type

Aquarium Concern

Brand

7 Brands are shown below

Fish Type

Deals & Savings

Price

Customer Rating