Water, Care & Conditioning

(75 results)
Top Fin® Pre-Conditioned Aquarium Water
(248)
$16.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(377)
$3.19 - $16.62
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Pre-Conditioned Betta Aquarium Water
(10)
$11.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(210)
$3.94 - $8.00
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(538)
$2.28 - $24.75
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Aquarium Water Conditioner
3 sizes
(259)
$4.99 - $9.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
API® Quick Start Aquarium Cycling Water Conditioner
3 sizes
(312)
$8.68 - $13.58
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Seachem® Prime®
2 sizes
(9)
$52.11 - $88.99
Save 35% On Your First Autoship Order!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Aquarium Readistart Nitrifying Bacteria Starter
2 sizes
(174)
$7.99 - $10.49
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
API® Aquarium Salt
3 sizes
(193)
$8.78 - $112.48
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API® ACCU Clear Aquarium Water Clairifier
2 sizes
(305)
$5.58 - $9.49
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Betta Aquarium Water Conditioner
2 sizes
(132)
$3.99 - $5.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Top Fin® Pre-Conditioned Betta Aquarium Water
(42)
$4.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
API® Melafix Fish Bacterial Infection Treatment
(8)
$8.18
$9.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API® Pimafix Fish Fungal Infection Treatment
(0)
$7.18
$9.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API® Stress Zyme Aquarium Water Conditioner
3 sizes
(93)
$10.58 - $59.98
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® All-in-One Water Conditioner
(6)
$8.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Natural Rapport Aquarium Gravel Cleaner
(23)
$15.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Seachem® Matrix™
3 sizes
(20)
$8.79 - $35.09
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 3 more
Fritz Aquatics Nature Box Catappa Leaves Natural Water Conditioner
(28)
$10.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Aqua Essential
2 sizes
(70)
$8.68 - $15.88
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Freshwater Aquarium Starter Kit
(53)
$14.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Aqueon® Pure Bacteria Supplement
(51)
$9.29
$9.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Instant Ammonia Aquarium Neutralizer
(13)
$8.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Top Fin® Aquarium Water Clarifier
2 sizes
(156)
$5.59 - $8.49
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Top Fin® Aquarium Biological Cleaner
2 sizes
(62)
$7.99 - $16.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Seachem® Purigen®
(10)
$57.19
$115.31
Save 35% On Your First Autoship Order!
Sign In & Enjoy Free Shipping Over $49
Seachem® Stability®
2 sizes
(8)
$48.11 - $77.09
Save 35% On Your First Autoship Order!
Sign In & Enjoy Free Shipping Over $49
API® Algaefix Aquarium Algae Control
3 sizes
(433)
$9.49 - $16.98
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API® Pond Algaefix
(160)
$17.79
$34.98
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Tetra® EasyBalance Nitraban Aquarium Water Treatment
(71)
$13.87
$13.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Tetra food & watercare - Online Only!
+ 3 more
API® Tap Water Conditioner Super Strength Aquarium Dechlorinator
3 sizes
(206)
$4.78 - $40.58
Save 35% On Your First Autoship Order!
Sign In & Enjoy Free Shipping Over $49
API® Ammo Lock
(30)
$10.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API® Proper pH 7.0 Aquarium Water pH Conditioner
(71)
$11.18
$11.49
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Tetra® AquaSafe Plus Aquarium Dechlorinator Water Conditioner
3 sizes
(178)
$6.32 - $17.27
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Tetra food & watercare - Online Only!
+ 3 more
GloFish® Water Conditioner
(0)
$4.24
$7.19
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
TetraPond GreenFree UV Clarifier
2 sizes
(0)
$179.99 - $364.99
Buy 1, get the 2nd 25% OFF all Tetra food & watercare - Online Only!
Save 35% On Your First Autoship Order!
+ 1 more
API Chlorine & Heavy Metal Neutralizer Pond water Conditioner
(0)
$26.98
$33.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API Pond Aqua Essential
(0)
$16.98
$23.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API Stress Zyme Water Conditioner
(14)
$5.88
$6.49
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
  1. 1
  2. 2
Keeping your pet fish’s tank in great shape involves using the right aquarium water care and conditioning products. In order to keep the water in your aquarium in great condition, you will occasionally need to purchase these products so your fish can live their best life. Pet parents can find the aquarium water care, aquarium water conditioner, and other aquarium supplies they need at PetSmart. 
Our collection of aquarium water care and conditioner supplies includes products like: 
Aquarium Water Conditioner
Pre-Conditioned Water
Aquarium Salt
Fish Tank Water Clarifier
Turtle Tank Water Cleaner
Algae Control
Ammonia Remover Pads
Bacteria Supplements
Fish Tank Dechlorinator
Fresh Water Starter Kits
Goldfish Minerals
And More
You are sure to find the exact fish tank water supplies you need at PetSmart. Need something else for your pet fish while you’re here? We sell fish disease treatment, fish foodfish feedersfish tank plant carefish pond caresaltwater aquarium carefish tank water quality testers, and more
PetSmart also offers convenient shopping with curbside or in-store pickup. Need something today? We have select items available for same-day delivery in most areas powered by DoorDash. For items you purchase frequently, PetSmart has Autoship that automatically delivers the items you want to your door as often as you’d like. Check the website to see what items are eligible.