Water, Care & Conditioning

(21 results)
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(351)
$2.29 - $52.79
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Quick Start Aquarium Cycling Water Conditioner
3 sizes
(144)
$8.99 - $17.39
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Aquarium Salt
3 sizes
(185)
$8.99 - $112.49
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® ACCU Clear Aquarium Water Clairifier
2 sizes
(293)
$5.59 - $9.49
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+ 1 more
API® Stress Zyme Aquarium Water Conditioner
2 sizes
(89)
$10.59 - $59.99
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+ 1 more
API® Aqua Essential
2 sizes
(64)
$8.69 - $15.89
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API® Pond Algaefix
(14)
$24.99
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+ 1 more
API® pH Down Adjuster Aquarium Water Conditioner
2 sizes
(22)
$5.89 - $15.99
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+ 1 more
API® pH Up Adjuster Freshwater Aquarium Water Conditioner
(22)
$7.09
$8.49
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+ 1 more
API® Algaefix Aquarium Algae Control
3 sizes
(251)
$9.49 - $16.99
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+ 1 more
API® Tap Water Conditioner Super Strength Aquarium Dechlorinator
3 sizes
(40)
$4.79 - $40.59
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API® Ammo Lock
(26)
$10.99
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+ 1 more
API Chlorine & Heavy Metal Neutralizer Pond water Conditioner
(0)
$27.69
$33.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API Pond Aqua Essential
(0)
$23.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API Stress Zyme Water Conditioner
(6)
$5.89
$6.49
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Quick Start
(16)
$2.79
$4.49
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Betta Aquarium Water Conditioner
(30)
$4.09
$4.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Stress Zyme
(2)
$3.49
$3.99
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+ 1 more
API® Pond Melaflix
(10)
$15.99
$18.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Proper pH 7.0 Aquarium Water pH Conditioner
(60)
$11.49
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Proper pH 8.2 Aquarium Water pH Conditioner
(4)
$12.09
$15.79
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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.