Marine & Freshwater

(1154 results)
Aqueon Standard Glass Rectangle Aquarium
7 sizes
(291)
$12.49 - $94.99
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Top Fin® Essentials Aquarium Starter Kit
8 sizes
(4245)
$34.99 - $191.99
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+ 1 more
Top Fin® Large Power Filter Cartridges
(279)
$17.99
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+ 1 more
Marineland Open Glass Aquarium
3 sizes
(168)
$17.59 - $149.99
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Fluval® FX6 Aquarium Canister Filter
(200)
$369.99
$419.99
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Fluval® 407 Performance Aquarium Canister Filter
(124)
$229.99
$269.99
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+ 1 more
Fluval FX2 Aquarium Canister Filter
(36)
$269.99
$319.99
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+ 1 more
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(468)
$155.99
$194.99
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Top Fin® Fascinate Column Starter Kit
(310)
$44.99
$89.99
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API® Freshwater Aquarium Master Test Kit
(293)
$35.99
$39.99
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+ 2 more
Fluval® Plant Stratum Aquarium Substrate
(121)
$23.69
$28.99
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Fluval Plant & Shrimp Stratum
(8)
$46.49
$49.99
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+ 1 more
Top Fin® Mystic Oak Finish Aquarium Stand
3 sizes
(44)
$59.99 - $89.99
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+ 1 more
Instant Ocean® Sea Salt
2 sizes
(83)
$21.19 - $52.99
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CaribSea Super Naturals Aquarium Sand - Moonlight White
(102)
$19.99
$29.99
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Fluval AC Power Filter
4 sizes
(105)
$42.99 - $99.99
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+ 1 more
Aqua Natural Aquarium Sand - Galaxy Black
2 sizes
(91)
$14.39 - $24.99
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+ 1 more
Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(234)
$8.99 - $17.99
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Top Fin® Silenstream™ Small Filter Cartridges
(65)
$14.99
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Top Fin® Half Moon Aquarium - 3.5 Gallon
(2072)
$39.99
$44.99
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Half Moon Betta Aquarium only $39.99!
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Top Fin® Compact Aquarium Heater
3 sizes
(483)
$14.59 - $33.99
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+ 1 more
Top Fin® Aquarium Hinged Glass Lid
7 sizes
(216)
$16.99 - $58.99
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CaribSea Super Naturals Aquarium Sand - White
(22)
$19.99
$27.99
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+ 1 more
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(369)
$3.79 - $16.69
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Top Fin® Element EF-S Filter Cartridges
3 sizes
(371)
$8.99 - $17.99
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Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1509)
$18.99 - $49.99
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API® E.M. Erythromycin Fish Bacterial Infection Treatment
(75)
$21.98
$25.08
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+ 3 more
Aqua Natural Aquarium Substrate - Gold Pearl
(21)
$5.59
$14.99
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+ 1 more
Top Fin® Premium Aquarium Gravel - Classic Beach
(66)
$7.99
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+ 1 more
Omega™One Frozen Blood Worms Fish Food
(204)
$269.99
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Free Same-Day Delivery, No Order Minimum!
Omega™One Frozen Bloodworms
(186)
$9.99
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+ 1 more
Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(198)
$3.99 - $8.39
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API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(361)
$2.29 - $37.58
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Aqua Natural Aquarium Sand - White
(68)
$14.39
$14.99
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+ 1 more
Seachem® Purigen® Premium Synthetic Absorbent
2 sizes
(54)
$9.19 - $15.79
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BOGO 50% Off All Aquatic Media
+ 3 more
Top Fin® Silenstream Filter Cartridge - 3pk
(111)
$8.99
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+ 2 more
Omega™ One Frozen Brine Shrimp Fish Food
(90)
$6.99
$7.99
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+ 1 more
Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(47)
$7.99 - $25.99
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+ 1 more
Zoo Med Mopani Wood Aquarium Ornament
4 sizes
(187)
$4.99 - $54.99
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B2G1 more Free Aquatic Ornaments excluding Glofish
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Top Fin® Aquarium Airline Tubing
2 sizes
(98)
$4.99 - $7.69
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Explore Our Extensive Range of Fish Supplies 

At PetSmart, we offer a comprehensive selection of supplies for both freshwater and marine fish enthusiasts. Whether you're setting up a new aquarium or maintaining an existing one, our range of products ensures your aquatic pets thrive. From aquarium decor to essential maintenance tools, find everything you need to create a vibrant underwater world. 

Freshwater and Marine Fish Supplies 

Our collection includes a variety of aquarium accessories and pet fish supplies designed to cater to the unique needs of both freshwater and marine environments. Explore our selection of aquarium decor to enhance the beauty of your tank, and discover top-quality marine aquarium supplies to support the health of your aquatic life. 

Essential Aquarium Maintenance 

Maintaining a healthy aquarium requires the right tools and knowledge. Our range of aquarium maintenance products includes everything from filters to water conditioners, ensuring your tank remains a safe and clean environment for your fish. Learn how to maintain pH levels and keep your aquarium filter running efficiently with our expert tips. 

Frequently Asked Questions (FAQs) 

What maintenance does a fish tank need? 
Regular maintenance is crucial for a healthy aquarium. This includes cleaning the tank, changing the water, and checking the filter and pH levels. 
Can I put tap water in my fish tank? 
Tap water can be used in your fish tank, but it should be treated with a water conditioner to remove harmful chemicals like chlorine. 
Should an aquarium filter be on all the time? 
Yes, an aquarium filter should run continuously to maintain water quality and provide a healthy environment for your fish. 
How to maintain pH level in an aquarium? 
To maintain the pH level in your aquarium, regularly test the water and use pH adjusters as needed. Consistent water changes also help stabilize pH levels.