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Seachem

(38 results)
Seachem® Prime® Aquarium Water Conditioner Chlorine & Ammonia Detoxifier
4 sizes
(385)
$3.19
$6.99
Options from
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® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(214)
$4.99
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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® Purigen® Premium Synthetic Absorbent - Aquarium Filter Media
2 sizes
(68)
$9.89
$12.99
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Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Prime® Chlorine & Ammonia Detoxifier
2 sizes
(11)
$52.99
$105.09
Options from
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® Stability® for Aquarium Cycling
2 sizes
(8)
$48.11
$96.69
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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® Flourish Excel™ for Live Aquarium Plants
2 sizes
(14)
$10.79
$17.99
Options from
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® Matrix™ - Aquarium Filter Media
3 sizes
(20)
$7.99
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Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Flourish Potassium™ for Live Aquarium Plants
(6)
$11.39
$11.89
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® 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.
Seachem® Flourish® Freshwater Aquarium Comprehensive Plant Supplement
2 sizes
(55)
$7.99
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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® Alert Combo™ Aquarium pH & Ammonia Detector for Aquarium Water Testing
(80)
$9.54
$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.
Seachem® Reef Strontium™ 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® Reef Iodide™ for Reef Aquarium Water Care
2 sizes
(0)
$7.09
Options from
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 Advantage Magnesium™ for Reef Aquarium Water Care
2 sizes
(0)
$6.09
Options from
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
Options from
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)
$7.19
Options from
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)
$8.49
Options from
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)
$8.49
Options from
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 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)
$4.59
Options from
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 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.
Seachem® Flourish® for Live Aquarium Plants
(4)
$36.14
$72.86
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® Phosguard™ Aquarium Water Treatment
2 sizes
(7)
$32.30
$65.10
Options from
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® Cichlid Lake Salt™ for Freshwater Fish Tanks
(0)
$27.79
$41.09
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® Tidal™ 75 Zeolite Filter Pouch - Aquarium Media
(0)
$8.19
Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Tidal™ 110 MatrixCarbon - Aquarium Filter Media
(0)
$13.29
Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Tidal™ 75 Matrix Carbon - Aquarium Filter Media
(0)
$10.13
$20.49
Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Tidal Matrix™ - Internal Fish Tank Filter
(0)
$7.63
$15.39
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Tidal Matrix™ - Internal Fish Tank Filter
(2)
$6.98
$14.09
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Tidal ™ - Replacement Aquarium Filter Media for Fish Tanks
(0)
$11.99
$16.89
Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Tidal ™ - Replacement Aquarium Filter Media for Fish Tanks
(0)
$10.99
$13.69
Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Tidal ™ - Replacement Aquarium Filter Media for Fish Tanks
(0)
$9.49
$11.09
Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Marine Buffer™ for Reef Aquarium Water Care
(0)
$27.59
$42.39
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.
Seachem® Reef Complete™ Aquarium Water Treatment
(0)
$10.27
$20.70
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® Tidal™ Zeolite - Aquarium Filter Media
(0)
$16.39
$18.79
Save 40% On First Autoship Order of Aquatic Filter Media
Buy Any Aquatic Filter and Get 20% Off All Aquatic Media
Seachem® Marine Buffer
(2)
$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.
Seachem® Neutral Regulator Aquarium pH Water Conditioner for Aquarium pH Control
(6)
$7.29
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. 1
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.