Fish Tank Water Conditioners

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Fluval Plant & Shrimp Stratum Plant Care, 17.6-lb bag slide 1 of 7
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Fluval Plant & Shrimp Stratum Plant Care, 17.6-lb bag slide 1 of 7
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Fluval Plant & Shrimp Stratum Plant Care, 17.6-lb bag slide 1 of 7
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Fluval Plant & Shrimp Stratum Plant Care, 17.6-lb bag slide 1 of 7
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Fluval Plant & Shrimp Stratum Plant Care, 17.6-lb bag slide 1 of 7
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Fluval Plant & Shrimp Stratum Plant Care, 17.6-lb bag slide 1 of 7
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Sponsored

Fluval Plant & Shrimp Stratum Plant Care, 17.6-lb bag

Rated 3.3 out of 5 stars
3
$44.55 Chewy Price
$67.99 List Price
$42.32 Autoship Price

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

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Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 1 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 2 of 5
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Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 1 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 2 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 3 of 5
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Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 1 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 2 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 3 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 4 of 5
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Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 1 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 2 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 3 of 5
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Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 1 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 2 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 3 of 5
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Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 1 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 2 of 5
Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle slide 3 of 5
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Tetra AquaSafe Aquarium Water Conditioner, 1.69-oz bottle

Rated 5 out of 5 stars
20
$4.14 Chewy Price
Autoship Price

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

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Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 1 of 7
Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 2 of 7
Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 3 of 7
Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 4 of 7
Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 5 of 7
Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 6 of 7
Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 7 of 7
Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 1 of 7
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Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle slide 1 of 7
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Aqueon Betta Bowl Plus Water Conditioner, 4-oz bottle

Rated 4.7 out of 5 stars
38
$5.89 Chewy Price
$5.99 List Price
Autoship Price

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

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API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 1 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 2 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 3 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 4 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 5 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 6 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 7 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 1 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 2 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 3 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 4 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 5 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 6 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 7 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 1 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 2 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 3 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 4 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 5 of 7
API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner slide 6 of 7
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Bundle and Save 20%
Bundle: API Melafix Freshwater Fish Infection Remedy + Stress Coat Aquarium Water Conditioner
Rated 5 out of 5 stars
3
$23.25 Chewy Price
$29.16 List Price
Autoship Price

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

Fluval Biological Cleaner Water Conditioner, 8.4-oz bottle

Rated 4.9 out of 5 stars
15
$10.90 Chewy Price
$15.99 List Price
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 Reef Aquariums, 8-oz bottle

Rated 3.7 out of 5 stars
23
$61.59 Chewy Price
Autoship Price

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

Ruby Reef Rally PRO Aquarium Water Treatment, 64-oz bottle

Rated 5 out of 5 stars
4
$29.59 Chewy Price
$36.99 List Price
Autoship Price

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

GloFish Water Balance Aquarium Water Conditioner, 4-oz bottle

Rated 5 out of 5 stars
1
$5.09 Chewy Price
$7.79 List Price
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-oz bottle

Rated 5 out of 5 stars
5
$29.98 Chewy Price
$41.98 List Price
Autoship Price

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

Fritz FritzZyme Trace Aquarium Water Treatment, 16-oz bottle

Rated 5 out of 5 stars
1
$9.99 Chewy Price
Autoship Price

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

Bundle and Save 44%
Bundle: Tetra Lifeguard All-in-One Bacterial & Fungus Treatment + AquaSafe Plus Freshwater & Ma...
Rated 5 out of 5 stars
1
$12.75 Chewy Price
$22.78 List Price
Autoship Price

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

Tetra AquaSafe Aquarium Water Conditioner, 8.45-oz bottle

Rated 5 out of 5 stars
30
$8.98 Chewy Price
$9.09 List Price
Autoship Price

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

API Quick Start Freshwater & Saltwater Aquarium Nitrifying Bacteria, 32-oz bottle

Rated 4.4 out of 5 stars
11
$33.98 Chewy Price
$47.98 List Price
Autoship Price

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

Aqueon Ammonia Neutralizer Water Conditioner, 16-oz bottle

Rated 4.7 out of 5 stars
21
$10.21 Chewy Price
$13.99 List Price
Autoship Price

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

Microbe-Lift Nite Out II Marine Aquarium Water Treatment, 4-oz bottle

Rated 4.8 out of 5 stars
4
$7.13 Chewy Price
$8.78 List Price
Autoship Price

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

API Pond Accu-Clear Clarifier, 16-oz bottle

Rated 4.4 out of 5 stars
37
$13.48 Chewy Price
$18.98 List Price
Autoship Price

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

Tetra Pond AquaSafe Tap Water Conditioner, 16.9-oz bottle

Rated 5 out of 5 stars
26
$10.97 Chewy Price
$16.19 List Price
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, 4-oz bottle

Rated 2.9 out of 5 stars
8
$37.79 Chewy Price
Autoship Price

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

API Pond Ammo-Lock Pond Water Ammonia Detoxifier

Rated 4.3 out of 5 stars
6
$50.98 Chewy Price
$71.48 List Price
Autoship Price

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

Fritz Algae Clean Out Aquarium Water Treatment, 4-oz bottle

Rated 4 out of 5 stars
13
$5.50 Chewy Price
Autoship Price

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

Fritz Clarifier Aquarium Water Conditioner, 16-oz bottle

Rated 3.7 out of 5 stars
3
$19.99 Chewy Price
Autoship Price

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

GloFish Aquarium Water Conditioner, 4-oz bottle

Rated 4.9 out of 5 stars
8
$5.22 Chewy Price
$7.19 List Price
Autoship Price

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

API Marine Stress Zyme Saltwater Aquarium Cleaning Solution, 16-oz bottle

Rated 5 out of 5 stars
8
$15.59 Chewy Price
$21.78 List Price
Autoship Price

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

Bundle and Save 46%
Bundle: Aqueon Betta Bowl Plus Water Conditioner + Betta Fish Food
Rated 5 out of 5 stars
1
$5.60 Chewy Price
$10.46 List Price
Autoship Price

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

Dr. Tim's Aquatics Reef Eco-Balance Marine Aquarium Cleaner, 16-oz bottle

$25.29 Chewy Price
Autoship Price

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

Python Multi Purpose Bio-Support Aquarium Water Care, 4-oz bottle

Rated 3 out of 5 stars
3
$4.36 Chewy Price
$7.99 List Price
Autoship Price

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

Coralife Marine PURE Water Care Bacteria Supplement, 4 pack

Rated 5 out of 5 stars
1
$10.83 Chewy Price
$14.99 List Price
Autoship Price

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

Ruby Reef HydroPlex Aquarium Water Treatment, 8-oz bottle

Rated 2 out of 5 stars
1
$9.99 Chewy Price
Autoship Price

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

Coralife Biocube UV Sterilizer Lamp Fish Water Conditioner, 5 watts

Rated 3 out of 5 stars
2
$45.56 Chewy Price
$64.99 List Price
Autoship Price

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

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

Rated 1 out of 5 stars
1
$20.49 Chewy Price
Autoship Price

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

Fritz FritzGuard Aquarium Water Conditioner, 16-oz bottle

Rated 5 out of 5 stars
1
$9.34 Chewy Price
Autoship Price

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

Dr. Tim's Aquatics Re-Fresh Reef Tank Revitalizer, 8-oz bottle

Rated 3 out of 5 stars
2
$33.99 Chewy Price
Autoship Price

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

Aquascape Clean for Ponds Fish, 16-oz bottle

$19.98 Chewy Price
Autoship Price

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

Microbe-Lift Aquarium Cycling & Water Conditioning Kit, 4-oz bottle

Rated 5 out of 5 stars
1
$24.95 Chewy Price
Autoship Price

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

API Stress Coat with Pump Aquarium Water Conditioner, 16-oz bottle

Rated 4.3 out of 5 stars
15
$13.02 Chewy Price
$16.28 List Price
Autoship Price

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

API Aquarium Start-Up Pack

Rated 5 out of 5 stars
3
$5.78 Chewy Price
$8.28 List Price
Autoship Price

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

API Goldfish Protect Aquarium Water Conditioner, 4-oz bottle

Rated 4.4 out of 5 stars
9
$4.78 Chewy Price
$5.98 List Price
Autoship Price

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

Save 5% on repeat deliveries

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