Water, Care & Conditioning

(80 results)
Top Fin® Pre-Conditioned Aquarium Water
2 sizes
(228)
$16.79 - $16.99
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
+ 2 more
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(365)
$3.79 - $16.69
20% OFF In-Store Pickup with code: PICKUP20
Save 35% On Your First Autoship Order!
+ 2 more
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(361)
$2.29 - $37.58
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
API® Quick Start Aquarium Cycling Water Conditioner
3 sizes
(144)
$8.99 - $17.39
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(192)
$3.99 - $8.39
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API® Aquarium Salt
3 sizes
(185)
$8.99 - $112.49
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Top Fin® Pre-Conditioned Betta Aquarium Water
(40)
$4.49
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
+ 3 more
Top Fin® Pre-Conditioned Betta Water
(0)
$11.99
20% OFF In-Store Pickup with code: PICKUP20
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Top Fin® Aquarium Water Conditioner
3 sizes
(243)
$4.19 - $9.99
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
+ 3 more
Top Fin® Aquarium Readistart Nitrifying Bacteria Starter
2 sizes
(169)
$7.99 - $10.49
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
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API® ACCU Clear Aquarium Water Clairifier
2 sizes
(297)
$5.59 - $9.49
20% OFF In-Store Pickup with code: PICKUP20
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API® Stress Zyme Aquarium Water Conditioner
3 sizes
(89)
$10.58 - $59.98
20% OFF In-Store Pickup with code: PICKUP20
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Seachem® Prime®
2 sizes
(5)
$52.19 - $88.99
Save 35% On Your First Autoship Order!
Sign In & Enjoy Free Shipping Over $49
Tetra® AquaSafe Plus Aquarium Dechlorinator Water Conditioner
3 sizes
(170)
$7.99 - $17.29
20% OFF In-Store Pickup with code: PICKUP20
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Seachem® Matrix™
3 sizes
(20)
$4.49 - $35.09
Buy 1 Get the 2nd 50% Media
20% OFF In-Store Pickup with code: PICKUP20
+ 3 more
Top Fin® Betta Aquarium Water Conditioner
2 sizes
(130)
$3.49 - $5.99
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
+ 3 more
API® Melafix Fish Bacterial Infection Treatment
(2)
$9.99
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
Natural Rapport Aquarium Gravel Cleaner
(21)
$15.99
20% OFF In-Store Pickup with code: PICKUP20
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API® Aqua Essential
2 sizes
(70)
$8.69 - $15.88
20% OFF In-Store Pickup with code: PICKUP20
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Top Fin® Freshwater Aquarium Starter Kit
(51)
$14.99
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
+ 3 more
Thrive Turtle Water Cleaner
(18)
$8.99
20% OFF In-Store Pickup with code: PICKUP20
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Top Fin® Instant Ammonia Aquarium Neutralizer
(13)
$8.99
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
+ 3 more
Top Fin® Aquarium Biological Cleaner
2 sizes
(60)
$7.99 - $16.99
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
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Seachem® Stability®
2 sizes
(8)
$48.19 - $77.09
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Sign In & Enjoy Free Shipping Over $49
Tetra® SafeStart Aquarium Cycling Water Conditioner
(106)
$10.49
$10.99
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
API® Algaefix Aquarium Algae Control
3 sizes
(251)
$9.48 - $16.98
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
Tetra® EasyBalance Nitraban Aquarium Water Treatment
(69)
$13.87
$13.99
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
GloFish® Water Conditioner
(0)
$4.99
$5.99
20% OFF In-Store Pickup with code: PICKUP20
Free Same-Day Delivery, No Order Minimum!
API® Pimafix Fish Fungal Infection Treatment
(0)
$8.49
$9.99
20% OFF In-Store Pickup with code: PICKUP20
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TetraPond GreenFree UV Clarifier
2 sizes
(0)
$176.19 - $364.49
20% OFF In-Store Pickup with code: PICKUP20
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+ 1 more
API Chlorine & Heavy Metal Neutralizer Pond water Conditioner
(0)
$27.69
$33.99
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
API Pond Aqua Essential
(0)
$16.99
$23.99
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
API Stress Zyme Water Conditioner
(12)
$5.89
$6.49
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
Aqueon AquaPacs Water Conditioner
(108)
$7.99
$9.99
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Top Fin® All-in-One Water Conditioner
(6)
$8.99
Buy 1 Get the 2nd 25% Off Top Fin Food & Watercare (excludes Pond)
20% OFF In-Store Pickup with code: PICKUP20
+ 3 more
Aqueon® Water Conditioner
(22)
$10.99
$13.99
20% OFF In-Store Pickup with code: PICKUP20
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+ 1 more
Natural Rapport Aquarium All-In-1 Water Conditioner
(14)
$16.99
20% OFF In-Store Pickup with code: PICKUP20
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+ 2 more
Fritz Bactershield Bio-Adhesive Supplement
(12)
$12.79
$16.49
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+ 2 more
Seachem® Reef Advantage Magnesium™
2 sizes
(0)
$6.09 - $21.20
20% OFF In-Store Pickup with code: PICKUP20
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+ 1 more
Aqueon® Shrimp Essentials
(6)
$6.39
$6.99
20% OFF In-Store Pickup with code: PICKUP20
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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.