Skip to search Skip to main content

Not in the U.S?

Not shopping in the U.S. or plan on shipping to a Canadian address?

Continue to Canada site

Get help from our experts 24/7

1-800-672-4399

Sign In or Create Account

CartCart Shopping Cart, 0 items

Your cart is empty.

Something missing? Sign in to see items you may have added from another computer or device.

Not in the U.S?

Not shopping in the U.S. or plan on shipping to a Canadian address?

Continue to Canada site

Get help from our experts 24/7

1-800-672-4399

Sign In or Create Account

CartCart Shopping Cart, 0 items

Your cart is empty.

Something missing? Sign in to see items you may have added from another computer or device.

Fresh Food & Toppers

Veterinary Diets

Shop by Health Condition

Bones, Bully Sticks & Naturals

Soft & Chewy Treats

Biscuits & Cookies

Long-Lasting Chews

Freeze-Dried & Dehydrated

Lickable Treats

Health & Pharmacy

Vitamins & Supplements

Probiotics & Digestive Health

Allergy & Itch Relief

Heartworm & Dewormers

Pharmacy & Prescriptions

Anxiety & Calming Care

Crates, Pens & Gates

Tech & Smart Home

Leashes, Collars & Harnesses

Bowls & Feeders

Clothing & Accessories

Carriers & Travel

Training & Behavior

Dog Deals New Dog Supplies Pet Parent Supplies Shop all Dog

Treat Dispensing Toys

Rope & Tug Toys

Cleaning & Potty

Pee Pads & Diapers

Poop Bags & Scoopers

Cleaners & Stain Removers

Vacuums & Steam Cleaners

Brushes & Combs

Shampoos & Conditioners

Paw & Nail Care

Made by Chewy

Purina Pro Plan

Hill's

Blue Buffalo

Royal Canin

Bark

Seresto is the original 8-month flea & tick collar. No prescription required.

Shop by Health Consideration

Veterinary Diets

Highest Quality Food

Lickable Treats

Soft & Chewy Treats

Litter Boxes & Accessories

Tech & Smart Home

Carriers & Travel

Bowls & Feeders

Collars, Leashes & Harnesses

Cat Deals Pet Parent Supplies Shop all Cat

Health & Pharmacy

Vitamins & Supplements

Probiotics & Digestive Health

Allergy & Itch Relief

Pharmacy & Prescriptions

Anxiety & Calming Care

Urinary Tract & Kidneys

Trees & Scratchers

Scratchers & Scratching Posts

Interactive & Electronic Toys

Teasers & Wands

Balls & Chasers

Plush & Mice Toys

Chewy Made

Blue Buffalo

Litter robot

Temptations

Hill's Science Diet

Purina Pro Plan

Free $25 eGift card with your $75 order of Purina Pro Plan food & supplements. Code: PURINAPRO25. Shop now. Exclusions apply.

Health and Wellness

Vitamins and Supplements

Feeders, Waterers and Deicers

Chick Starter Feed

Nesting and Egg Supplies

Coops and Accessories

Vitamins and Healthcare

Llama and Alpaca

Livestock Supplements

Wild Bird & Wildlife

Wild Bird Feeders

Hummingbird Supplies

Duck and Waterfowl

Enclosures & Habitat Accessories

Cages and Accessories

Freshwater Fish Supplies

Saltwater Fish Supplies

Koi and Pond Supplies

Aquariums and Fish Tanks

Fish Tank Filters and Media

Aquarium Decorations

Reptile & Amphibian

Live Feeder Insects

Tanks & Terrariums

Heating & Lighting

Nutrena

Buckeye

Purina

Cosequin

Farnam

Tribute

Summer horse essentials. Shop electrolytes, fly control, supplies, and more.

Order your pet's prescription items.

Shop all Pharmacy

Health Services

Chat free with our vet team

CarePlus Pet Insurance & Wellness Plans

Compounded Medications

Choose from a variety of flavors, strengths, and forms for your pet or horse.

Learn about compounding

Prescription Flea & Tick
Heartworm Prevention
Pain Relief & Arthritis
Antibiotics & Antifungals
Allergy Relief
Anxiety & Calming
Ear & Skin Conditions
Eye Drops & Ointments
Urinary & Kidney
Diabetes Care & Insulin

Prescription Flea & Tick
Dewormers & Parasiticides
Eye Drops & Ointments
Antibiotics & Antifungals
Allergy Relief
Anxiety & Calming
Urinary & Kidney
Thyroid & Hormone
Pain Relief & Arthritis
Diabetes Care & Insulin

Joint and Anti-Inflammatory
Metabolic and Endocrine
Calming and Behavioral Support
Pain Medicine
Antibiotics
Allergy and Immune
Vitamins and Electrolytes

Expert Health Tips

PetMD

Connect with a Vet

Chat for free with a licensed vet tech.

CarePlus Pet Insurance & Wellness Plans

Give your pet the best possible health coverage with pet insurance and wellness plans.

Exceptional in-person routine and urgent care from our compassionate veterinary teams.

Schedule a visit

Food & Nutrition

Health & Wellness

Training & Behavior

Vet Recommended Dog Food

Food & Nutrition

Health & Wellness

Training & Behavior

Vet Recommended Cat Food

Feed & Nutrition

Health & Wellness

Riding & Management

Training & Behavior

Freshwater Fish

Health & Wellness

Belgian Malinois

German Shepherd

Best Dog Breed Supplies

Chewy Picks

Best Dog Supplies

Best Cat Supplies

Best Horse Supplies

Best Fish Supplies

Best Reptile Supplies

Best Bird Supplies

Best Small Animal Supplies

How We Give Back

We've donated more than $100M in products to rescue animal centers.

Donate to a Rescue

You can help us make an impact by donating items to your local shelter.

Find Pets to Adopt

Search thousands of pets from shelters and rescues in Chewy's network.

Join Our Network

Join our network to access benefits and resources that’ll help more pets.

CartCart Shopping Cart, 0 items

Free $25 eGift card with your $49+ order

Fish
Water Care

Aquarium & Fish Tank Water Care

Water Test Kits
Monitor pH, ammonia & other water parameters.
Water Conditioners
Remove chlorine & chloramines in tanks.
Water Clarifiers
Clear water & manage bacteria blooms.
Beneficial Bacteria
Help jump start natural biological filtration.
Plant Care
Includes fertilizers & nutrients for live plants.
Algaecides
Control algae in water, on décor & substrate.
pH Treatments
Keep tank pH in the proper range for your fish.
Therapeutic Salt
Reduces stress & improves fish health.
Mineral Salt
Marine salt & trace element supplements.
Botanicals
Add tannins to lower pH & soften water naturally.

Sort By

Fluval Supply Set Fish CO2 Care slide 1 of 5

Fluval Supply Set Fish CO2 Care slide 2 of 5

Fluval Supply Set Fish CO2 Care slide 3 of 5

Fluval Supply Set Fish CO2 Care slide 4 of 5

Fluval Supply Set Fish CO2 Care slide 5 of 5

Fluval Supply Set Fish CO2 Care

Rated 3 out of 5 stars

3.0

9

$99.99 Chewy Price$99.99

Autoship Price

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

ASF SeaTest PO4- Phosphate Fish Aquarium Water Test Kit, 40 count slide 1 of 2

ASF SeaTest PO4- Phosphate Fish Aquarium Water Test Kit, 40 count slide 2 of 2

ASF SeaTest PO4- Phosphate Fish Aquarium Water Test Kit, 40 count

$20.39 Chewy Price$20.39

($0.51/ea) Price per Unit($0.51/ea)

$27.99 List Price$27.99

Autoship Price

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

Fritz FixIck Aquarium Water Treatment, 16-fl oz bottle

Fritz FixIck Aquarium Water Treatment, 16-fl oz bottle

Rated 4.6 out of 5 stars

4.6

9

$15.99 Chewy Price$15.99

($1.00/fl oz) Price per Unit($1.00/fl oz)

$19.99 List Price$19.99

Autoship Price

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

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 1 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 2 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 3 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 4 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 5 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 6 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 7 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 8 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant slide 9 of 9

HydrOasis Dwarf Shrimp Bundle Fish Plant

Rated 5 out of 5 stars

5.0

1

$29.99 Chewy Price$29.99

Autoship Price

Live Plant

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

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

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

Rated 4.7 out of 5 stars

4.7

48

$16.98 Chewy Price$16.98

($1.07/fl oz) Price per Unit($1.07/fl oz)

Autoship Price

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

DrTim's Aquatics Axolotl One & Only Water Conditioner, 2-fl oz bottle

Loading options...

Loading options...

DrTim's Aquatics Axolotl One & Only Water Conditioner, 2-fl oz bottle

Rated 2.5 out of 5 stars

2.5

4

$16.79 Chewy Price$16.79

($8.40/fl oz) Price per Unit($8.40/fl oz)

$16.99 List Price$16.99

Autoship Price

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

Laguna Water Prep Aquarium Water Maintenance Solution, 67.5-oz

Laguna Water Prep Aquarium Water Maintenance Solution, 67.5-oz

$48.99 Chewy Price$48.99

($0.73/oz) Price per Unit($0.73/oz)

Autoship Price

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

DrTim's Aquatics Betta One & Only Water Conditioner, 2-fl oz bottle

Loading options...

Loading options...

DrTim's Aquatics Betta One & Only Water Conditioner, 2-fl oz bottle

Rated 5 out of 5 stars

5.0

1

$13.41 Chewy Price$13.41

($6.71/fl oz) Price per Unit($6.71/fl oz)

$16.99 List Price$16.99

Autoship Price

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

Microbe-Lift Aquatic Turtle Rock & Substrate Cleaner, 4-oz bottle

Microbe-Lift Aquatic Turtle Rock & Substrate Cleaner, 4-oz bottle

Rated 3.8 out of 5 stars

3.8

9

$7.78 Chewy Price$7.78

($1.95/oz) Price per Unit($1.95/oz)

$8.99 List Price$8.99

Autoship Price

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

API Marine Quick Start Aquarium Water Conditioner, 16-fl oz bottle

API Marine Quick Start Aquarium Water Conditioner, 16-fl oz bottle

Rated 4.6 out of 5 stars

4.6

18

$19.99 Chewy Price$19.99

($1.25/fl oz) Price per Unit($1.25/fl oz)

$27.98 List Price$27.98

Autoship Price

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

API Pond pH Up Pond Water pH Raising Solution, 16-oz bottle

API Pond pH Up Pond Water pH Raising Solution, 16-oz bottle

Rated 4.9 out of 5 stars

4.9

16

$22.28 Chewy Price$22.28

($1.40/oz) Price per Unit($1.40/oz)

Autoship Price

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

Fluval Sea Iodine Aquarium Water Conditioner, 8-oz bottle

Fluval Sea Iodine Aquarium Water Conditioner, 8-oz bottle

Rated 5 out of 5 stars

5.0

3

$8.99 Chewy Price$8.99

($1.13/oz) Price per Unit($1.13/oz)

Autoship Price

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

Fritz Aquarium Water Nitrite Test Kit

Fritz Aquarium Water Nitrite Test Kit

Rated 3 out of 5 stars

3.0

1

$11.99 Chewy Price$11.99

$15.99 List Price$15.99

Autoship Price

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

HydrOasis Wisteria Submerged Bunched Reg Freshwater Fish Plant, 6 count

New

HydrOasis Wisteria Submerged Bunched Reg Freshwater Fish Plant, 6 count

$49.99 Chewy Price$49.99

Autoship Price

Live Plant

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

AquaZen Freshwater Aquarium CO2 3-in-1 Diffuser, Small

AquaZen Freshwater Aquarium CO2 3-in-1 Diffuser, Small

$19.99 Chewy Price$19.99

$20.00 List Price$20.00

Autoship Price

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

ME Coral Single Shot Dip Aquarium Coral Care, 15 count

ME Coral Single Shot Dip Aquarium Coral Care, 15 count

$45.00 Chewy Price$45.00

($3.00/ea) Price per Unit($3.00/ea)

Autoship Price

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

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

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

Rated 4.2 out of 5 stars

4.2

12

$11.87 Chewy Price$11.87

($0.99/ea) Price per Unit($0.99/ea)

$16.99 List Price$16.99

Autoship Price

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

DrTim's Aquatics Shrimp One & Only Water Conditioner, 2-fl oz bottle

Loading options...

Loading options...

DrTim's Aquatics Shrimp One & Only Water Conditioner, 2-fl oz bottle

$13.41 Chewy Price$13.41

($6.71/fl oz) Price per Unit($6.71/fl oz)

$16.99 List Price$16.99

Autoship Price

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

Microbe-Lift Parazoryne Parastic Disease Water Conditioner, 16-oz bottle

Microbe-Lift Parazoryne Parastic Disease Water Conditioner, 16-oz bottle

Rated 4.9 out of 5 stars

4.9

10

$30.75 Chewy Price$30.75

($1.93/oz) Price per Unit($1.93/oz)

Autoship Price

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

API Pond 5-IN-1 Test Strips, 25 count

API Pond 5-IN-1 Test Strips, 25 count

Rated 4.6 out of 5 stars

4.6

25

$14.98 Chewy Price$14.98

($0.60/ea) Price per Unit($0.60/ea)

$20.98 List Price$20.98

Autoship Price

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

Lifegard Fish Pond Ammonia Test Strips, 25 count

Lifegard Fish Pond Ammonia Test Strips, 25 count

$26.40 Chewy Price$26.40

($1.06/ea) Price per Unit($1.06/ea)

$27.03 List Price$27.03

Autoship Price

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

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

Loading options...

Loading options...

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

Rated 2.8 out of 5 stars

2.8

12

$20.99 Chewy Price$20.99

($10.50/fl oz) Price per Unit($10.50/fl oz)

$27.99 List Price$27.99

Autoship Price

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

AquaForest Perfect Water for Aquariums, 1.32-gal

AquaForest Perfect Water for Aquariums, 1.32-gal

Rated 5 out of 5 stars

5.0

4

$9.99 Chewy Price$9.99

($7.57/gl) Price per Unit($7.57/gl)

Autoship Price

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

Milwaukee Instruments Digital Conductivity Pen EC Aquarium Water Test Kit

Milwaukee Instruments Digital Conductivity Pen EC Aquarium Water Test Kit

$34.50 Chewy Price$34.50

Autoship Price

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

HydrOasis Cabomba Submerged Bunched Reg Freshwater Fish Plant, 6 count

New

HydrOasis Cabomba Submerged Bunched Reg Freshwater Fish Plant, 6 count

$49.99 Chewy Price$49.99

Autoship Price

Live Plant

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

AquaZen Aquarium Water Conditioner - Clarifier, 8.45-fl oz bottle

AquaZen Aquarium Water Conditioner - Clarifier, 8.45-fl oz bottle

$12.99 Chewy Price$12.99

($1.54/fl oz) Price per Unit($1.54/fl oz)

Autoship Price

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

ME Coral Alkalinity Liquid Aquarium Mineral, 32-oz

ME Coral Alkalinity Liquid Aquarium Mineral, 32-oz

$14.98 Chewy Price$14.98

($0.47/oz) Price per Unit($0.47/oz)

Autoship Price

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

DrTim's Aquatics Shrimp First Defense Water Conditioner, 4-fl oz bottle

Loading options...

Loading options...

DrTim's Aquatics Shrimp First Defense Water Conditioner, 4-fl oz bottle

$11.29 Chewy Price$11.29

($2.83/fl oz) Price per Unit($2.83/fl oz)

$13.99 List Price$13.99

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

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

$4.94 Chewy Price$4.94

($2.47/oz) Price per Unit($2.47/oz)

$4.95 List Price$4.95

Autoship Price

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

DrTim's Aquatics Eco-Balance Saltwater Aquarium Cleaner, 16-fl oz bottle

Loading options...

Loading options...

DrTim's Aquatics Eco-Balance Saltwater Aquarium Cleaner, 16-fl oz bottle

$25.69 Chewy Price$25.69

($1.61/oz) Price per Unit($1.61/oz)

$31.99 List Price$31.99

Autoship Price

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

Hydrospace PNS DeepCycle Fish Aquarium Substrate, Purple, 16-oz

Hydrospace PNS DeepCycle Fish Aquarium Substrate, Purple, 16-oz

Rated 5 out of 5 stars

5.0

1

$37.99 Chewy Price$37.99

($2.38/oz) Price per Unit($2.38/oz)

Autoship Price

Contains Live Feed

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

HydrOasis Moneywort Submerged Bunched Reg Freshwater Fish Plant, 6 count

New

HydrOasis Moneywort Submerged Bunched Reg Freshwater Fish Plant, 6 count

$49.99 Chewy Price$49.99

Autoship Price

Live Plant

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

Fluval Disposable CO2 Cartridge Fish CO2 Care, 3 count

Fluval Disposable CO2 Cartridge Fish CO2 Care, 3 count

Rated 3.5 out of 5 stars

3.5

6

$69.99 Chewy Price$69.99

($23.33/ea) Price per Unit($23.33/ea)

Autoship Price

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

Tamsco Instruments Sharp Pointed Scissors Aquascaping Tool, 6-in

New

Tamsco Instruments Sharp Pointed Scissors Aquascaping Tool, 6-in

$12.00 Chewy Price$12.00

Autoship Price

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

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

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

$7.57 Chewy Price$7.57

($0.24/fl oz) Price per Unit($0.24/fl oz)

$8.99 List Price$8.99

Autoship Price

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

Microbe-Lift Autumn/Winter Prep Pond Water Care, 1-gal jug

Microbe-Lift Autumn/Winter Prep Pond Water Care, 1-gal jug

Rated 4 out of 5 stars

4.0

1

$104.74 Chewy Price$104.74

($104.74/gl) Price per Unit($104.74/gl)

$115.99 List Price$115.99

Autoship Price

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

Previous
Next
1
6
7
8
9
12

Related Searches

aquarium & fish tank plant fertilizers
saltwater aquarium water treatment
aquarium & fish tank water clarifiers
wet fish food
freshwater fish supplies
fish pond cleaner & water treatment
best water treatments for fish ponds
best fish & aquarium supplies
therapeutic salt
fish tank filter cleaning
river fish food
filtration bacteria

Today's Deals

Learn

Chewy Plus

Gift Card

Category

Water Test Kits
Water Conditioner
Plant Fertilizers
Algaecide & Water Clarifier
Filtration Bacteria
Water Treatments
Water Clarifiers
Mineral Salt
Therapeutic Salt
Aquarium Botanicals

Save 5% on repeat deliveries

Product Type

Aquarium CO2 Care

Aquarium Coral Care

Aquarium Maintenance Kit

Aquarium Mineral Salt

Aquarium pH Treatment

Aquarium Plant Supplement

Aquarium Water Test Kit

Aquascaping Tool

Cleaners & Stain Removers

Coral Accessory

Filter Accessory

Filtration Bacteria Starters

Mineral Salt Bath

Plant Accessory

Reagent Test Kit

Replacement Parts

Therapeutic Salt

Water Clarifier

Water Conditioner

Water Dechlorinator

Brand

Find a brand

7 Brands are shown below

Aquarium Type

Aquarium Concern

Water Chemistry Correction

Discolored Water and Algae

Mold, Worms, and Particles

Fish Type

Tropical Freshwater

Marine Invertebrate

Koi & Pond Fish

Freshwater Invertebrate

Water Test Type

Health Feature

Anti-Fungal / Anti-Bacterial

Color Enhancement

Reproduction & Nursing

Vitamins & Minerals

Deals & Savings

Price

Customer Rating

Rated 4 out of 5 stars

Rated 3 out of 5 stars

Rated 2 out of 5 stars

Rated 1 out of 5 stars