What water treatment do I need for a freshwater aquarium?

Most freshwater aquariums need a water conditioner to remove chlorine and chloramines from tap water. Depending on your tank's needs, you may also require pH balancers, ammonia removers, and bacteria supplements to keep water parameters stable and fish healthy.

Do I need a special water conditioner for freshwater tanks?

Yes, freshwater aquariums need water conditioners formulated specifically for their environment. These treatments neutralize harmful chemicals in tap water and support a safe, stress-free habitat for your fish.

Tropical Fish Tank Health & Water Care - Page 2 (Free Shipping)

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API CO2 Booster Freshwater Aquarium Plant Care Treatment, 16-oz bottle slide 2 of 4

API CO2 Booster Freshwater Aquarium Plant Care Treatment, 16-oz bottle slide 3 of 4

API CO2 Booster Freshwater Aquarium Plant Care Treatment, 16-oz bottle slide 4 of 4

API CO2 Booster Freshwater Aquarium Plant Care Treatment, 16-oz bottle

Rated 4.5 out of 5 stars

62

$14.68 Chewy Price

($0.92/oz) Price per Unit

$20.48 List Price

28% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Slide 1 of 7

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle slide 2 of 7

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle slide 3 of 7

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle slide 4 of 7

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle slide 5 of 7

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle slide 6 of 7

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle slide 7 of 7

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle

Rated 4.7 out of 5 stars

24

$3.49 Chewy Price

($0.88/fl oz) Price per Unit

$9.99 List Price

65% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Slide 1 of 6

SunGrow Mini Indian Almond Leaves Pleco & Shrimp Food, Aquarium Water Conditioner that Lowers pH, 50 count slide 2 of 6

SunGrow Mini Indian Almond Leaves Pleco & Shrimp Food, Aquarium Water Conditioner that Lowers pH, 50 count slide 3 of 6

SunGrow Mini Indian Almond Leaves Pleco & Shrimp Food, Aquarium Water Conditioner that Lowers pH, 50 count slide 4 of 6

SunGrow Mini Indian Almond Leaves Pleco & Shrimp Food, Aquarium Water Conditioner that Lowers pH, 50 count slide 5 of 6

SunGrow Mini Indian Almond Leaves Pleco & Shrimp Food, Aquarium Water Conditioner that Lowers pH, 50 count slide 6 of 6

SunGrow Mini Indian Almond Leaves Pleco & Shrimp Food, Aquarium Water Conditioner that Lowers p...

Rated 4.4 out of 5 stars

28

$6.97 Chewy Price

($0.14/ea) Price per Unit

$9.99 List Price

30% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Acurel F Aquarium Water Clarifier, 50-mL bottle

Rated 4.6 out of 5 stars

158

$8.99 Chewy Price

$9.99 List Price

10% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Kordon NovAqua Plus Aquarium Water Conditioner, 16-fl oz bottle

Rated 4.4 out of 5 stars

19

$6.49 Chewy Price

($0.41/fl oz) Price per Unit

$16.36 List Price

60% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Tetra Easy Balance Aquarium Water Conditioner, 3.38-oz bottle

Rated 4.6 out of 5 stars

17

$6.27 Chewy Price

($1.86/oz) Price per Unit

$7.29 List Price

14% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Microbe-Lift Gravel & Substrate Cleaner, 16-oz bottle

Rated 5 out of 5 stars

4

$15.57 Chewy Price

($0.98/oz) Price per Unit

$18.48 List Price

16% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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API Pimafix Freshwater & Saltwater Fish Fungal Infection Remedy, 16-oz bottle

Rated 4.3 out of 5 stars

109

$12.08 Chewy Price

($0.76/oz) Price per Unit

$16.88 List Price

28% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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API Tap Water Conditioner Aquarium Water Conditioner, 32-fl oz bottle

Rated 4.8 out of 5 stars

109

$20.69 Chewy Price

($0.65/fl oz) Price per Unit

$22.58 List Price

Autoship Price

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

Fritz FritzGuard Aquarium Water Conditioner, 16-fl oz bottle

Rated 4.7 out of 5 stars

7

$10.83 Chewy Price

($0.68/fl oz) Price per Unit

$12.99 List Price

17% Off

Autoship Price

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

API 5 in 1 Freshwater & Saltwater Aquarium Test Strips, 100 count

Rated 4.5 out of 5 stars

131

$24.98 Chewy Price

($0.25/ea) Price per Unit

$34.98 List Price

29% Off

Autoship Price

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

API pH Up Freshwater Aquarium Water Treatment, 16-oz bottle

Rated 4.6 out of 5 stars

81

$18.69 Chewy Price

($1.17/oz) Price per Unit

$19.78 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-fl oz bottle

Rated 4.6 out of 5 stars

45

$8.99 Chewy Price

($0.57/fl oz) Price per Unit

$14.49 List Price

38% Off

Autoship Price

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

45% Off

Autoship Price

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

Fluval Biological Cleaner Water Conditioner, 8.4-fl oz bottle

Rated 4.7 out of 5 stars

29

$11.98 Chewy Price

($1.43/fl oz) Price per Unit

$15.99 List Price

25% Off

Autoship Price

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

Aqueon 7-in-1 Aquarium Test Strips, 50 count

Rated 4.4 out of 5 stars

67

$8.73 Chewy Price

($0.18/ea) Price per Unit

$17.99 List Price

51% Off

Autoship Price

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

Tetra AquaSafe Freshwater & Marine Aquarium Water Conditioner & Dechlorinator, 3.38-fl oz

Rated 4.8 out of 5 stars

56

$5.52 Chewy Price

($1.64/fl oz) Price per Unit

$6.29 List Price

12% Off

Autoship Price

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

Kordon AmQuel Plus Ammonia Detoxifier Aquarium Water Conditioner, 1-gal bottle

Rated 4.8 out of 5 stars

25

$57.46 Chewy Price

($57.46/gl) Price per Unit

Autoship Price

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

Tetra Ick Guard Fast Remedy Ick Treatment, 8 count

Rated 4.2 out of 5 stars

63

$4.99 Chewy Price

($0.63/ea) Price per Unit

Autoship Price

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

API Aqua Essential Aquarium Treatment, 16-fl oz bottle

Rated 4.6 out of 5 stars

74

$15.88 Chewy Price

($1.00/fl oz) Price per Unit

$22.28 List Price

29% Off

Autoship Price

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

Fritz FritzZyme Trace Aquarium Water Treatment, 16-fl oz bottle

Rated 4.4 out of 5 stars

7

$12.08 Chewy Price

($0.76/fl oz) Price per Unit

$12.99 List Price

Autoship Price

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

API Proper pH 8.2 Aquarium Water Treatment, 7.1-oz bottle

Rated 4.5 out of 5 stars

20

$11.18 Chewy Price

($1.58/oz) Price per Unit

$15.78 List Price

29% Off

Autoship Price

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

Tetra WaterClarifier Cloudy Water Clarifier, 3.38-fl oz bottle

Rated 4.5 out of 5 stars

69

$5.32 Chewy Price

($1.58/fl oz) Price per Unit

$6.29 List Price

15% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Aqueon PURE Bacteria Supplement, 10-gal, 12 count

Rated 4.4 out of 5 stars

48

$9.02 Chewy Price

($0.76/ea) Price per Unit

$19.99 List Price

55% Off

Autoship Price

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

Dr. Tim's Aquatics AquaCleanse Freshwater Aquarium Cleaner, 32-fl oz bottle

Rated 4.8 out of 5 stars

4

$24.99 Chewy Price

($0.79/fl oz) Price per Unit

Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Jun 1 and Jun 4

Fluval Bio Clear Water Treatment, 4-fl oz bottle

Rated 4.1 out of 5 stars

15

$5.99 Chewy Price

($1.50/fl oz) Price per Unit

$7.99 List Price

25% Off

Autoship Price

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

API Nitrate NO3 Freshwater & Saltwater Aquarium Test Kit, 90 count

Rated 4.8 out of 5 stars

48

$13.98 Chewy Price

($0.16/ea) Price per Unit

$19.78 List Price

29% Off

Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Fritz Mardel Maracyn Oxy Fish Aquarium Treatment, 4-oz bottle

Rated 4.4 out of 5 stars

21

$10.39 Chewy Price

($2.60/oz) Price per Unit

$12.99 List Price

20% Off

Autoship 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 4.7 out of 5 stars

15

$10.24 Chewy Price

($1.28/oz) Price per Unit

Autoship Price

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

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

Rated 4 out of 5 stars

15

$36.99 Chewy Price

($0.58/fl oz) Price per Unit

Autoship Price

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

API Aquarium Starter Kit

Rated 4.9 out of 5 stars

10

$31.38 Chewy Price

$43.48 List Price

28% Off

Autoship Price

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

Fritz Algae Clean Out Aquarium Water Treatment, 8-fl oz bottle

Rated 4 out of 5 stars

45

$10.39 Chewy Price

($1.30/fl oz) Price per Unit

$12.99 List Price

20% Off

Autoship Price

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

AquaZen Algae Remover, 8.45-fl oz bottle

Rated 5 out of 5 stars

2

$12.99 Chewy Price

($1.54/fl oz) Price per Unit

$13.00 List Price

Autoship Price

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

Tetra EasyStrips Complete Freshwater & Saltwater Aquarium Test Strips, 25 count

Rated 4.2 out of 5 stars

32

$9.99 Chewy Price

($0.40/ea) Price per Unit

$26.39 List Price

62% Off

Autoship Price

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

Aqueon AquaPacs Aquarium Sludge Remover, 12 pack, 10-gal

Rated 4.2 out of 5 stars

12

$11.87 Chewy Price

($0.99/ea) Price per Unit

$16.99 List Price

30% Off

Autoship Price

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

Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Freshwater Aquariums, 16-fl oz bottl...

Rated 4.3 out of 5 stars

45

$22.59 Chewy Price

($1.42/fl oz) Price per Unit

$34.99 List Price

35% Off

Autoship Price

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

Tropical Fish Tank Health & Water Care

API CO2 Booster Freshwater Aquarium Plant Care Treatment, 16-oz bottle

Aqueon Shrimp Tank Plus Freshwater Aquarium Water Conditioner, 4-fl oz bottle

SunGrow Mini Indian Almond Leaves Pleco & Shrimp Food, Aquarium Water Conditioner that Lowers p...

Acurel F Aquarium Water Clarifier, 50-mL bottle

Kordon NovAqua Plus Aquarium Water Conditioner, 16-fl oz bottle

Tetra Easy Balance Aquarium Water Conditioner, 3.38-oz bottle

Microbe-Lift Gravel & Substrate Cleaner, 16-oz bottle

API Pimafix Freshwater & Saltwater Fish Fungal Infection Remedy, 16-oz bottle

API Tap Water Conditioner Aquarium Water Conditioner, 32-fl oz bottle

Fritz FritzGuard Aquarium Water Conditioner, 16-fl oz bottle

API 5 in 1 Freshwater & Saltwater Aquarium Test Strips, 100 count

API pH Up Freshwater Aquarium Water Treatment, 16-oz bottle

Aqueon Ammonia Neutralizer Water Conditioner, 16-fl oz bottle

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

Fluval Biological Cleaner Water Conditioner, 8.4-fl oz bottle

Aqueon 7-in-1 Aquarium Test Strips, 50 count

Tetra AquaSafe Freshwater & Marine Aquarium Water Conditioner & Dechlorinator, 3.38-fl oz

Kordon AmQuel Plus Ammonia Detoxifier Aquarium Water Conditioner, 1-gal bottle

Tetra Ick Guard Fast Remedy Ick Treatment, 8 count

API Aqua Essential Aquarium Treatment, 16-fl oz bottle

Fritz FritzZyme Trace Aquarium Water Treatment, 16-fl oz bottle

API Proper pH 8.2 Aquarium Water Treatment, 7.1-oz bottle

Tetra WaterClarifier Cloudy Water Clarifier, 3.38-fl oz bottle

Aqueon PURE Bacteria Supplement, 10-gal, 12 count

Dr. Tim's Aquatics AquaCleanse Freshwater Aquarium Cleaner, 32-fl oz bottle

Fluval Bio Clear Water Treatment, 4-fl oz bottle

API Nitrate NO3 Freshwater & Saltwater Aquarium Test Kit, 90 count

Fritz Mardel Maracyn Oxy Fish Aquarium Treatment, 4-oz bottle

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

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

API Aquarium Starter Kit

Fritz Algae Clean Out Aquarium Water Treatment, 8-fl oz bottle

AquaZen Algae Remover, 8.45-fl oz bottle

Tetra EasyStrips Complete Freshwater & Saltwater Aquarium Test Strips, 25 count

Aqueon AquaPacs Aquarium Sludge Remover, 12 pack, 10-gal

Dr. Tim's Aquatics Waste-Away Natural Aquarium Cleaner for Freshwater Aquariums, 16-fl oz bottl...

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