Salt Water Aquarium Care

(46 results)
Instant Ocean® Sea Salt
2 sizes
(79)
$21.19 - $52.99
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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
Instant Ocean® Reef Crystals Aquarium Reef Salt
2 sizes
(61)
$28.99 - $66.79
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+ 1 more
Nature's Ocean Live Nutri-Seawater
(24)
$22.99
$25.99
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+ 1 more
Instant Ocean Reef Crystals Reef Salt 200 Gal
(1)
$76.49
$102.49
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Instant Ocean Sea Salt 200 Gal
(0)
$56.90
$81.29
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Seachem® Clarity™
(16)
$9.79
$14.99
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+ 1 more
Fluval® Marine Nano LED Light w/Bluetooth
(6)
$109.99
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+ 1 more
Fluval® Sea Mini Protein Skimmer
(10)
$39.99
$52.99
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+ 1 more
API® Reef Aquarium Water Test Kit
(0)
$35.99
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+ 1 more
Fritz ProAquatics Reef Pro Mix Marine Salt
(6)
$21.29
$29.99
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Fluval® SEA CP1 Circulation Pump
(2)
$23.99
$25.39
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+ 1 more
San Francisco Bay Brand® Marine Cuisine™ Frozen Fish Food
(17)
$9.99
Buy 1, Get the 2nd 25% off all Frozen Fish Food
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+ 1 more
San Francisco Bay Brand® Sally's Frozen Silversides™ Tropical Fish Food
(30)
$12.99
Buy 1, Get the 2nd 25% off all Frozen Fish Food
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+ 1 more
API® Saltwater Aquarium Master Test Kit
(8)
$35.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
San Francisco Bay Brand® Saltwater Multi-Pack™ Fish Food
(20)
$10.49
Buy 1, Get the 2nd 25% off all Frozen Fish Food
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+ 1 more
San Francisco Bay Brand® Sally's Frozen Spirulina Brine Shrimp™ Frozen Fish Food
(78)
$7.99
Buy 1, Get the 2nd 25% off all Frozen Fish Food
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+ 1 more
Fritz A+ Aquarium Salt
(4)
$7.19
$12.99
Extra 20% off online only with code SAVE20, see terms.
Save 35% On Your First Autoship Order!
+ 2 more
Seachem® Reef Strontium™
(0)
$7.09
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Seachem® Reef Iodide™
2 sizes
(0)
$8.39 - $10.19
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Seachem® Reef Advantage Magnesium™
2 sizes
(0)
$6.09 - $20.89
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Seachem® Reef Plus™
2 sizes
(0)
$7.29 - $10.69
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Seachem® Reef Buffer™
2 sizes
(0)
$7.19 - $21.00
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Seachem® Reef Fusion 2™
2 sizes
(0)
$8.50 - $17.49
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Seachem® Reef Fusion 1™
2 sizes
(0)
$8.50 - $12.99
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Seachem® Reef Status Calcium Kit
(0)
$34.49
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Seachem® Reef Carbonate™
2 sizes
(0)
$6.89 - $7.99
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SeaChem Reef Complete Marine Care
(0)
$7.09
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Fritz Aquatics Nature Box - All Natural Functional Decor
(26)
$10.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Marine Reef Aquarium Magnesium Solution
(0)
$13.59
$17.99
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Omega One™ Garlic Marine Slow-Sinking Mini Pellets
(1)
$4.99
$5.49
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Omega One™ Garlic Marine Flakes
(1)
$5.49
$6.49
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+ 1 more
Seachem® Marine Buffer™
(0)
$23.19
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API® Pimafix®
(47)
$46.09
$64.59
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API® Marine Quick Start
(12)
$19.99
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+ 1 more
API® Marine Stress Zyme
(5)
$15.59
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+ 1 more
Omega™ One Super Veggie Seaweed
2 colors
(12)
$8.49 - $8.99
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+ 1 more
API® Marine Melafix
(2)
$12.49
$14.99
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+ 1 more
API® Marine Complete Trace
(2)
$12.99
$15.59
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Marine Calcium
(4)
$16.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
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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.