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 5 (Free Shipping)

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Penn-Plax Pro-Carb Aquarium Cleaner, 28-oz bottle slide 2 of 5

Penn-Plax Pro-Carb Aquarium Cleaner, 28-oz bottle slide 3 of 5

Penn-Plax Pro-Carb Aquarium Cleaner, 28-oz bottle slide 4 of 5

Penn-Plax Pro-Carb Aquarium Cleaner, 28-oz bottle slide 5 of 5

Penn-Plax Pro-Carb Aquarium Cleaner, 28-oz bottle

Rated 3.5 out of 5 stars

2

$21.98 Chewy Price

($0.79/oz) Price per Unit

$24.99 List Price

Autoship Price

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

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DrTim's Aquatics Freshwater Waste-Away Gel Water Conditioner, Small: 10-gal, 1 count slide 2 of 7

DrTim's Aquatics Freshwater Waste-Away Gel Water Conditioner, Small: 10-gal, 1 count slide 3 of 7

DrTim's Aquatics Freshwater Waste-Away Gel Water Conditioner, Small: 10-gal, 1 count slide 4 of 7

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DrTim's Aquatics Freshwater Waste-Away Gel Water Conditioner, Small: 10-gal, 1 count

Rated 2 out of 5 stars

1

$14.99 Chewy Price

($1.50/gl) Price per Unit

Autoship Price

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

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Microbe-Lift Herbtana Salt & Freshwater Fish Treatment, 16-oz bottle slide 2 of 6

Microbe-Lift Herbtana Salt & Freshwater Fish Treatment, 16-oz bottle slide 3 of 6

Microbe-Lift Herbtana Salt & Freshwater Fish Treatment, 16-oz bottle slide 4 of 6

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Microbe-Lift Herbtana Salt & Freshwater Fish Treatment, 16-oz bottle slide 6 of 6

Microbe-Lift Herbtana Salt & Freshwater Fish Treatment, 16-oz bottle

Rated 4.6 out of 5 stars

13

$19.06 Chewy Price

($1.20/oz) Price per Unit

$20.99 List Price

Autoship Price

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

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HydrOasis Aquatic Bundle Freshwater Fish Plant, 10-gal slide 2 of 9

HydrOasis Aquatic Bundle Freshwater Fish Plant, 10-gal slide 3 of 9

HydrOasis Aquatic Bundle Freshwater Fish Plant, 10-gal slide 4 of 9

HydrOasis Aquatic Bundle Freshwater Fish Plant, 10-gal slide 5 of 9

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New

HydrOasis Aquatic Bundle Freshwater Fish Plant, 10-gal

$38.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 2 and Sep 6

API Freshwater Aquarium Salt, 50-lb

Rated 5 out of 5 stars

5

$112.48 Chewy Price

($2.25/lb) Price per Unit

$157.48 List Price

Autoship Price

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

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 16-fl oz

Rated 5 out of 5 stars

1

$30.99 Chewy Price

($1.94/oz) Price per Unit

Autoship Price

Contains Live Feed

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

Fluval Disposable CO2 Cartridge Fish CO2 Care, 3 count

Rated 3.5 out of 5 stars

6

$69.99 Chewy Price

($23.33/ea) Price per Unit

Autoship Price

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

New

HydrOasis Cabomba Submerged Bunched Reg Freshwater Fish Plant, 6 count

$49.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 2 and Sep 6

DrTim's Aquatics NP-Active Pearls for Nutrient Control in Aquariums, 450-mL bottle

Rated 4.7 out of 5 stars

3

$31.70 Chewy Price

($0.08/mL) Price per Unit

$45.99 List Price

Autoship Price

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

ASF SEATEST GH Total Hardness Fish Aquarium Water Test Kit, 40 count

Rated 1 out of 5 stars

2

$16.74 Chewy Price

($0.42/ea) Price per Unit

$18.99 List Price

Autoship Price

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

New

HydrOasis Wisteria Submerged Bunched Reg Freshwater Fish Plant, 6 count

$49.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 2 and Sep 6

DrTim's Aquatics Shrimp Waste-Away Gel Water Conditioner, Small, 2 count

$19.29 Chewy Price

($9.65/ea) Price per Unit

$23.99 List Price

Autoship Price

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

Fritz Aquarium Water Nitrite Test Kit

Rated 3 out of 5 stars

1

$11.99 Chewy Price

$15.99 List Price

Autoship Price

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

Microbe-Lift Aquatic Stress Relief Aquarium Treatment, 8-oz bottle

Rated 4.5 out of 5 stars

2

$9.49 Chewy Price

($1.19/oz) Price per Unit

$11.99 List Price

Autoship Price

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

Salifert Aquarium Oxygen Test Kit

Rated 4.7 out of 5 stars

6

$14.89 Chewy Price

Autoship Price

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

DrTim's Aquatics Shrimp Water Conditioner, 32-fl oz bottle

$7.57 Chewy Price

($0.24/fl oz) Price per Unit

$8.99 List Price

Autoship Price

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

DrTim's Aquatics Waste-Away Gel Turtle Water Conditioner, Medium, 2 count

$29.19 Chewy Price

($14.60/ea) Price per Unit

$35.99 List Price

Autoship Price

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

ASF SeaTest Ca2+ Calcium Fish Aquarium Water Test Kit, 40 count

Rated 3 out of 5 stars

1

$18.44 Chewy Price

($0.47/ea) Price per Unit

$27.99 List Price

Autoship Price

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

HydrOasis Jungle Water Bundle Fish Plant

Rated 5 out of 5 stars

1

$24.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Sep 2 and Sep 6

New

HydrOasis Rotala Nanjenshan Submerged Bunched Reg Freshwater Fish Plant, 3 count

$32.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Sep 2 and Sep 6

DrTim's Aquatics Waste-Away Gel Plant Water Conditioner, Medium, 2 count

Rated 1 out of 5 stars

1

$23.60 Chewy Price

($11.80/ea) Price per Unit

$35.99 List Price

Autoship Price

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

Dennerle Profi-Line CO2 Maxi Flipper Fish Aquarium Diffuser

Rated 5 out of 5 stars

1

$72.00 Chewy Price

Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 5 and Sep 9

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DrTim's Aquatics First Defense Freshwater Aquarium Cleaner, 8-fl oz bottle

Rated 4.6 out of 5 stars

21

$14.99 Chewy Price

($1.88/fl oz) Price per Unit

$23.99 List Price

Autoship Price

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

ASF SeaTest pH Fish Aquarium Water Test Kit, 100 count

Rated 5 out of 5 stars

1

$10.53 Chewy Price

($0.11/ea) Price per Unit

$20.99 List Price

Autoship Price

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

HydrOasis Starter Bundle Fish Plant

$47.69 Chewy Price

$49.99 List Price

Autoship Price

Live Plant

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 2 and Sep 6

New

HydrOasis Corkscrew Vallisneria Submerged Bunched Reg Freshwater Fish Plant, 6 count

$49.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 2 and Sep 6

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

Rated 3.8 out of 5 stars

20

$29.59 Chewy Price

($0.47/fl oz) Price per Unit

$36.99 List Price

Autoship Price

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

New

Aquatop Clear Magic Freshwater Fish Water Conditioner, 30-gal, 6 count

$11.99 Chewy Price

($0.07/gl) Price per Unit

Autoship Price

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

Fritz Bug Out Pro Coral Dip, 4-fl oz bottle

Rated 2.3 out of 5 stars

3

$13.59 Chewy Price

($3.40/fl oz) Price per Unit

$14.99 List Price

Autoship Price

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

Dennerle CO2 Micro-Flipper Fish Aquarium Diffuser

$32.00 Chewy Price

Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Sep 5 and Sep 9

Fluval CO2 Aquarium Indicator Kit

Rated 2.2 out of 5 stars

6

$16.96 Chewy Price

$16.99 List Price

Autoship Price

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

ASF SeaTest NO3- Nitrate Fish Aquarium Water Test Kit, 40 count

$17.25 Chewy Price

($0.44/ea) Price per Unit

$23.99 List Price

Autoship Price

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

New

HydrOasis Jungle Vallisneria Submerged Bunched Reg Freshwater Fish Plant, 6 count

$55.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 2 and Sep 6

New

HydrOasis Anacharis Najas Submerged Bunched Reg Freshwater Fish Plant, 6 count

$49.99 Chewy Price

Autoship Price

Live Plant

Free delivery on first-time orders
Free 365-day returns
Arrives between Sep 2 and Sep 6

biOrb Aquarium Service Kit 3 Plus Water Optimizer

Rated 4.8 out of 5 stars

45

$31.00 Chewy Price

$36.99 List Price

Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Sep 4 and Sep 8

Salifert Aquarium Phosphate Test Kit

Rated 5 out of 5 stars

6

$16.67 Chewy Price

$19.61 List Price

Autoship Price

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

Tropical Fish Tank Health & Water Care

Penn-Plax Pro-Carb Aquarium Cleaner, 28-oz bottle

DrTim's Aquatics Freshwater Waste-Away Gel Water Conditioner, Small: 10-gal, 1 count

Microbe-Lift Herbtana Salt & Freshwater Fish Treatment, 16-oz bottle

HydrOasis Aquatic Bundle Freshwater Fish Plant, 10-gal

API Freshwater Aquarium Salt, 50-lb

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 16-fl oz

Fluval Disposable CO2 Cartridge Fish CO2 Care, 3 count

HydrOasis Cabomba Submerged Bunched Reg Freshwater Fish Plant, 6 count

DrTim's Aquatics NP-Active Pearls for Nutrient Control in Aquariums, 450-mL bottle

ASF SEATEST GH Total Hardness Fish Aquarium Water Test Kit, 40 count

HydrOasis Wisteria Submerged Bunched Reg Freshwater Fish Plant, 6 count

DrTim's Aquatics Shrimp Waste-Away Gel Water Conditioner, Small, 2 count

Fritz Aquarium Water Nitrite Test Kit

Microbe-Lift Aquatic Stress Relief Aquarium Treatment, 8-oz bottle

Salifert Aquarium Oxygen Test Kit

DrTim's Aquatics Shrimp Water Conditioner, 32-fl oz bottle

DrTim's Aquatics Waste-Away Gel Turtle Water Conditioner, Medium, 2 count

ASF SeaTest Ca2+ Calcium Fish Aquarium Water Test Kit, 40 count

HydrOasis Jungle Water Bundle Fish Plant

HydrOasis Rotala Nanjenshan Submerged Bunched Reg Freshwater Fish Plant, 3 count

DrTim's Aquatics Waste-Away Gel Plant Water Conditioner, Medium, 2 count

Dennerle Profi-Line CO2 Maxi Flipper Fish Aquarium Diffuser

DrTim's Aquatics First Defense Freshwater Aquarium Cleaner, 8-fl oz bottle

ASF SeaTest pH Fish Aquarium Water Test Kit, 100 count

HydrOasis Starter Bundle Fish Plant

HydrOasis Corkscrew Vallisneria Submerged Bunched Reg Freshwater Fish Plant, 6 count

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

Aquatop Clear Magic Freshwater Fish Water Conditioner, 30-gal, 6 count

Fritz Bug Out Pro Coral Dip, 4-fl oz bottle

Dennerle CO2 Micro-Flipper Fish Aquarium Diffuser

Fluval CO2 Aquarium Indicator Kit

ASF SeaTest NO3- Nitrate Fish Aquarium Water Test Kit, 40 count

HydrOasis Jungle Vallisneria Submerged Bunched Reg Freshwater Fish Plant, 6 count

HydrOasis Anacharis Najas Submerged Bunched Reg Freshwater Fish Plant, 6 count

biOrb Aquarium Service Kit 3 Plus Water Optimizer

Salifert Aquarium Phosphate Test Kit

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