• $0 - $50+


Seachem

(43 results)
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(357)
$3.79 - $16.69
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 2 more
Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(190)
$3.99 - $8.39
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 2 more
Seachem® Purigen® Premium Synthetic Absorbent
2 sizes
(50)
$9.99 - $15.09
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 4 more
Seachem® Prime®
2 sizes
(5)
$53.29 - $88.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Matrix™
3 sizes
(20)
$6.19 - $35.09
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 4 more
Seachem® The Bag ™ Welded Filter
(4)
$9.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 4 more
Seachem® Flourish Excel™
(10)
$9.29
$11.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 2 more
Seachem® Clarity™
(16)
$8.69
$14.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 2 more
Seachem® Stability®
2 sizes
(8)
$51.39 - $77.09
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Alert Combo™ Aquarium pH & Ammonia Detector
(76)
$15.79
$18.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 2 more
Seachem® Reef Strontium™
(0)
$7.09
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Iodide™
2 sizes
(0)
$8.39 - $10.19
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Advantage Magnesium™
2 sizes
(0)
$6.09 - $22.79
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Plus™
2 sizes
(0)
$7.29 - $10.69
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Buffer™
2 sizes
(0)
$7.19 - $21.00
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Fusion 2™
2 sizes
(0)
$8.50 - $17.49
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Fusion 1™
2 sizes
(0)
$8.50 - $12.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Status Calcium Kit
(0)
$34.49
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Carbonate™
2 sizes
(0)
$6.89 - $7.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
SeaChem Reef Complete Marine Care
(0)
$7.09
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® PhosGuard™
(3)
$4.89
$7.69
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 4 more
Seachem® CupriSorb™ - Copper & Heavy Metal Absorbent
(0)
$6.97
$14.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 4 more
Seachem® Matrix Carbon™
(0)
$6.97
$9.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 4 more
Seachem Flourish Potassium™
(6)
$7.19
$11.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 2 more
Seachem® Purigen®
(10)
$66.09
$74.39
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Flourish Excel™
2 sizes
(2)
$37.89 - $66.79
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Flourish®
(4)
$36.49
$39.89
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Phosguard™
2 sizes
(4)
$32.30 - $60.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Cichlid Lake Salt™
(0)
$23.89
$41.06
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Tidal™ 75 Zeolite Filter Pouch
(0)
$8.19
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 3 more
Seachem® Tidal™ 110 MatrixCarbon
(0)
$17.79
$20.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 3 more
Seachem® Tidal™ 75 Matrix Carbon
(0)
$10.19
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 3 more
Seachem® Tidal Matrix™
(0)
$7.69
$12.29
Online Only! Buy any Habitat, Save 20% on food and care
Spend $25+ get 2,500 points on all filters and media
+ 1 more
Seachem® Tidal Matrix™
(0)
$7.69
$11.29
Online Only! Buy any Habitat, Save 20% on food and care
Spend $25+ get 2,500 points on all filters and media
+ 1 more
Seachem® Tidal ™
(0)
$9.99
$16.88
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 3 more
Seachem® Tidal ™
(0)
$6.99
$10.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 3 more
Seachem® Tidal ™
(0)
$10.29
$11.69
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 3 more
Seachem® Marine Buffer™
(0)
$23.19
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Reef Complete™
(0)
$10.59
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 1 more
Seachem® Tidal™ Zeolite
(0)
$13.49
$14.99
Online Only! Buy any Habitat, Save 20% on food and care
Save 40% on your first Autoship Order!
+ 3 more
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Keep your fish feeling their best with the many different Seachem® aquarium products that are available at PetSmart. Whether you’re looking for water conditioners, plant substrates, stability systems, filters or more, we have what you need. Choosing the right supplies for your aquarium set-up can feel overwhelming with so many different options out there. When you choose Seachem products to create your fishes’ home, you can be confident in your decision. 
PetSmart’s selection of other brands and options of aquarium supplies includes:
You can find what you’re looking for to keep your fish living a happy and healthy life at PetSmart. Need other aquarium supplies while you’re here? We have you covered. 
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.