Salt Water Aquarium Care

(38 results)
Nature's Ocean Live Nutri-Seawater for Saltwater Aquariums
(37)
$21.39
$25.99
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.
Instant Ocean® Sea Salt for Saltwater Aquariums
2 sizes
(87)
$22.39
$23.99
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Instant Ocean® Reef Crystals - Reef Salt for Marine & Saltwater Aquariums
2 sizes
(66)
$25.92
$28.99
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API® Aquarium Salt for Fish Tanks
3 sizes
(193)
$8.78
$8.99
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API® Saltwater Aquarium Master Test Kit for Saltwater Aquarium Testing
(10)
$35.99
$37.99
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.
API® Reef Aquarium Water Test Kit for Saltwater Aquarium Testing
(0)
$35.99
$37.99
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.
Top Fin® Aquarium Salt - Saltwater Care - 33 oz
(0)
$7.99
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.
Instant Ocean Sea Salt 200 Gal for Saltwater Aquariums
(0)
$69.09
$81.29
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Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Seachem® Reef Strontium™ for Reef Aquarium Water Care
(0)
$7.03
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Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Seachem® Reef Iodide™ for Reef Aquarium Water Care
2 sizes
(0)
$11.29
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Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Seachem® Reef Advantage Magnesium™ for Reef Aquarium Water Care
2 sizes
(0)
$6.09
$11.99
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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.
Seachem® Reef Plus™ for Reef Aquarium Water Care
2 sizes
(0)
$7.24
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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.
Seachem® Reef Buffer™ for Reef Aquarium Water Care
2 sizes
(0)
$11.99
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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.
Seachem® Reef Fusion 2™ for Reef Aquarium Water Care
2 sizes
(0)
$11.99
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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.
Seachem® Reef Fusion 1™ for Reef Aquarium Water Care
2 sizes
(0)
$11.99
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Save 40% On First Autoship Order of Aquatic Watercare
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Seachem® Reef Status Calcium Kit for Reef Aquarium Water Care
(0)
$34.22
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.
Seachem® Reef Carbonate™ for Reef Aquarium Water Care
2 sizes
(0)
$9.19
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SeaChem Reef Complete Marine Care for Reef Aquarium Water Care
(0)
$7.03
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.
Seachem® Clarity™ for Saltwater Aquariums
(18)
$5.99
$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.
Omega One™ Garlic Marine Slow-Sinking Mini Pellets Fish Food for Saltwater Fish
(3)
$6.59
$5.99
Save 40% On First Autoship Order of Aquatic Food
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Omega One™ Garlic Marine Flakes Fish Food for Saltwater Fish
(3)
$5.99
$5.69
Save 40% On First Autoship Order of Aquatic Food
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Fritz ProAquatics Reef Pro Mix Marine Salt for Reef Aquarium Water Care
(6)
$29.99
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.
Seachem® Marine Buffer™ for Reef Aquarium Water Care
(0)
$27.59
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.
API® Pimafix® for Fungal Infections
(51)
$46.09
$64.59
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.
Seachem® Marine Buffer
(2)
$10.99
$9.99
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.
API® Marine Quick Start for Saltwater Aquariums
(12)
$19.99
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.
API® Marine Stress Zyme for Saltwater Aquariums
(5)
$15.48
$18.99
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.
Omega™ One Super Veggie Seaweed for Saltwater Fish
2 colors
(16)
$8.77
$9.99
Options from
Save 40% On First Autoship Order of Aquatic Food
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
API® Marine Melafix for Bacterial Infections & Fin Rot
(4)
$12.48
$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.
API® Marine Calcium
(4)
$18.39
$18.99
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
API® Algaefix Marine Aquarium Algaecide for Saltwater Aquariums
(12)
$18.98
$27.39
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.
API® Marine Stress Coat for Saltwater Aquariums
(4)
$10.98
$17.99
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.
Omega™ One Marine Garlic Pellets Fish Food for Saltwater Fish
(20)
$11.72
$13.99
Save 40% On First Autoship Order of Aquatic Food
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
Tetra® Marine Saltwater Flakes Fish Food Complete Diet
(4)
$11.79
$13.19
Save 40% On First Autoship Order of Aquatic Food
Buy 1 Get the 2nd 25% OFF on ALL Aquatic Food & Watercare! Excludes Top Fin® pre-conditioned water.
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PetSmart has saltwater aquarium supplies on sale! Help your finned friends live their best life by maintaining a clean tank. With saltwater aquarium and fish supplies on sale at PetSmart, you can create a habitat that's clean and beautiful. Pet parents can find everything they need to care for their saltwater fish at PetSmart. Shop our newest selection of saltwater aquarium supplies on sale for special savings on skimmers, saltwater liquid concentrates, seaweed, reef crystals, reef supplements and more.
 
Stock up and save on a variety of other fish care supplies, such as:
 
 
Looking for other discounted fish supplies? Stop by your local PetSmart or shop online to find great deals on everything you need to care for your freshwater or saltwater fish. 

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 which items are eligible.