Water Care & Conditioning

(79 results)
Top Fin® Pre-Conditioned Aquarium Water - Fish Tank Care - 2.5 Gallon
(253)
$16.99
Save 40% On First Autoship Order of Aquatic Watercare
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+ 2 more
Seachem® Prime® Aquarium Water Conditioner Chlorine & Ammonia Detoxifier
4 sizes
(385)
$3.19
$6.99
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Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(214)
$5.49
$4.99
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Top Fin® Pre-Conditioned Betta Aquarium Water - 1 Gallon
(12)
$12.99
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API® Stress Coat Tap Water Aquarium Conditioner for Tap Water Dechlorinating
6 sizes
(544)
$2.28
$4.99
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Top Fin® Aquarium Water Conditioner - 4-16 fl oz
3 sizes
(261)
$5.49
$4.99
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API® Quick Start Aquarium Cycling Water Conditioner
3 sizes
(312)
$8.68
$8.99
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Seachem® Prime® Chlorine & Ammonia Detoxifier
2 sizes
(11)
$52.99
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Top Fin® Readistart Aquarium Nitrifying Bacteria Starter - 4-8 oz
2 sizes
(176)
$7.99
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API® Aquarium Salt for Fish Tanks
3 sizes
(193)
$8.78
$8.99
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API® ACCU Clear Aquarium Water Clairifier for Cloudy Aquarium Water
2 sizes
(381)
$5.58
$7.99
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Seachem® Stability® for Aquarium Cycling
2 sizes
(8)
$48.11
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Top Fin® Betta Aquarium Water Conditioner - Fish Tank Care - 2-4 fl oz
2 sizes
(132)
$2.99
$3.99
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Top Fin® Pre-Conditioned Betta Aquarium Water - 32 fl oz
(42)
$2.19
$4.99
Save 40% On First Autoship Order of Aquatic Watercare
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API® Melafix Fish Bacterial Infection Treatment - 4 oz for Bacterial Infections & Fin Rot
(9)
$8.18
$9.99
Save 40% On First Autoship Order of Aquatic Watercare
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API® Pimafix Fish Fungal Infection Treatment - 4 oz for Fungal Infections
(0)
$7.18
$9.99
Save 40% On First Autoship Order of Aquatic Watercare
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API® Stress Zyme Aquarium Water Conditioner for Aquarium Cycling
3 sizes
(93)
$10.58
$11.99
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Natural Rapport Aquarium Gravel Cleaner Aquarium Water Treatment
(23)
$15.99
$17.99
Save 40% On First Autoship Order of Aquatic Watercare
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Seachem® Matrix™ - Aquarium Filter Media
3 sizes
(20)
$8.79
$7.99
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Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
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Fritz Aquatics Nature Box Catappa Leaves Natural Water Conditioner
(28)
$11.99
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Aqua Essential for Tap Water Dechlorinating
2 sizes
(114)
$8.68
$11.99
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Top Fin® Freshwater Aquarium Starter Kit - Fish Tank Care - 2 Count
(53)
$6.99
$14.99
Save 40% On First Autoship Order of Aquatic Watercare
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Aqueon® Pure Bacteria Supplement for Aquarium Cycling
(51)
$9.29
$9.99
Save 40% On First Autoship Order of Aquatic Watercare
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Top Fin® Biological Cleaner Aquarium Water Treatment - 4-16 fl oz
2 sizes
(62)
$5.89
$8.99
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Seachem® Purigen® Aquarium Water Treatment
(10)
$57.19
$115.31
Save 40% On First Autoship Order of Aquatic Watercare
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
+ 1 more
Tetra® SafeStart Aquarium Cycling Water Conditioner
(108)
$10.47
$11.99
Save 40% On First Autoship Order of Aquatic Watercare
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
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API® Algaefix Aquarium Algae Control
3 sizes
(445)
$9.49
$9.99
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Tetra® EasyBalance Nitraban Aquarium Water Treatment Nitrate Control for Fish Tanks
(71)
$13.99
$14.99
Save 40% On First Autoship Order of Aquatic Watercare
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
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API® Ammo Lock Ammonia Detoxifier
(104)
$10.99
$11.99
Save 40% On First Autoship Order of Aquatic Watercare
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
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Tetra® AquaSafe Plus Aquarium Dechlorinator Water Conditioner for Tap Water Dechlorinating
3 sizes
(180)
$6.32
$7.99
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biOrb® Complete Care - Aquarium Fish Tank Water Care - 100 mL
(0)
$11.99
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Save 35% On Your First Autoship Order!
biOrb® Water Optimizer - Aquarium Fish Tank Water Care - 100 mL
(0)
$10.99
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Save 35% On Your First Autoship Order!
Fluval® Betta Water Conditioner for Betta Fish Tank Aquariums - 0.84 fl oz
(0)
$2.99
$3.99
Save 25% on select Fluval betta products, price displayed
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Fluval® Tap Water Conditioner with PHE for Planted Fish Tank Aquariums - 8 fl oz
(0)
$9.99
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Tetra® WaterClarifier - Clears Cloudy Aquarium Water for Freshwater Aquariums
2 sizes
(92)
$5.32
$5.99
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Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Save 35% On Your First Autoship Order!
Top Fin® Pre-Conditioned Almond Leaf Betta Water - Fish Tank Care - 32 fl oz
(0)
$6.99
Save 40% On First Autoship Order of Aquatic Watercare
Buy 2, get the 3rd 50% OFF ALL Top Fin conditioned water
TetraPond GreenFree UV Clarifier for Clear Pond Water
2 sizes
(0)
$179.99
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API Chlorine & Heavy Metal Neutralizer Pond water Conditioner for Pond Water Care
(0)
$26.98
$33.99
Save 40% On First Autoship Order of Aquatic Watercare
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
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API Pond Aqua Essential for Pond Water Care
(0)
$16.98
$23.99
Save 40% On First Autoship Order of Aquatic Watercare
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API Stress Zyme Water Conditioner for Aquarium Cycling
(14)
$5.88
$6.99
Save 40% On First Autoship Order of Aquatic Watercare
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
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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 food, fish feeders, fish tank plant care, fish pond care, saltwater aquarium care, fish 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.