Marine & Freshwater

(411 results)
Top Fin® Essentials Aquarium Starter Kit
8 sizes
(4120)
$55.99 - $184.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Large Power Filter Cartridges
(269)
$17.99
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Buy 1 Get 2nd 50% Off all Aquatic Media
+ 3 more
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(451)
$110.99
$184.99
Free Same-Day Delivery, No Order Minimum!
Top Fin® Captivate Starter Kit
(412)
$80.99
$134.99
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Free Same-Day Delivery, No Order Minimum!
Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(221)
$8.99 - $17.99
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Buy 1 Get 2nd 50% Off all Aquatic Media
+ 3 more
Top Fin® Element EF-S Filter Cartridges
3 sizes
(357)
$8.99 - $17.99
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Buy 1 Get 2nd 50% Off all Aquatic Media
+ 3 more
Top Fin® Aquarium Hinged Glass Top
7 sizes
(172)
$16.99 - $58.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Compact Aquarium Heater
3 sizes
(461)
$14.59 - $33.99
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+ 1 more
Top Fin® Premium Aquarium Gravel - Classic Beach
(64)
$7.99
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+ 1 more
Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1460)
$12.99 - $45.99
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Spend $25+ get 2,500 points on all filters and media
+ 2 more
Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(45)
$7.99 - $25.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Silenstream Filter Cartridge - 3pk
(111)
$8.99
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Buy 1 Get 2nd 50% Off all Aquatic Media
+ 3 more
Top Fin® Aquarium Airline Tubing
2 sizes
(96)
$4.99 - $7.69
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+ 1 more
Top Fin® Floating Glass Aquarium Thermometer
(232)
$3.99
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+ 1 more
Top Fin® Fine Mesh Fish Net
(108)
$2.49
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+ 1 more
Top Fin® 36 Gallon Aquarium & Stand Ensemble Combo
(55)
$399.99
$449.99
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Top Fin® Fascinate Column Starter Kit
(294)
$71.99
$89.99
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Free Same-Day Delivery, No Order Minimum!
Top Fin® Aquarium Stand - 55 to 75 Gallon
(260)
$254.99
$299.99
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Top Fin® Aquarium Stand - 55 to 75 Gallon
(139)
$254.99
$299.99
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Top Fin® Silenstream™ Small Filter Cartridges
(63)
$14.99
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Buy 1 Get 2nd 50% Off all Aquatic Media
+ 3 more
Top Fin® 10 Gallon Angled Aquarium
(133)
$89.99
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Free Same-Day Delivery, No Order Minimum!
Top Fin® Corner Tank Aquarium Starter Kit - 6 Gallon
(328)
$34.99
$69.99
Free Same-Day Delivery, No Order Minimum!
Top Fin® Retreat™ RF-L Filter Cartridges
(107)
$14.99
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Buy 1 Get 2nd 50% Off all Aquatic Media
+ 3 more
Top Fin® 5 Gallon Shrimp & Plant Aquarium
(83)
$69.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Stand - 20 to 37 Gallon
(123)
$152.99
$179.99
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Top Fin® Premium Aquarium Gravel - Brown & White
(32)
$25.99
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+ 1 more
Top Fin® Half Moon Aquarium - 3.5 Gallon
(2049)
$39.99
$44.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® LED Bubble Wall Aquarium Kit
2 sizes
(825)
$89.99 - $134.99
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Free Same-Day Delivery, No Order Minimum!
Top Fin® Mystic Oak Finish Aquarium Stand
3 sizes
(38)
$59.99 - $139.99
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Top Fin® Aquarium Stand - 20 to 37 Gallon
(137)
$152.99
$179.99
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Top Fin® Premium Glass Aquarium - 5 Gallon
(1560)
$69.99
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Free Same-Day Delivery, No Order Minimum!
Top Fin® Stone & Coral Bubbler Aquarium Ornament
(281)
$59.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Fin Automatic Fish Feeder
(254)
$29.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Shrimp & Plant Oasis Tank - 3 Gallon
(276)
$54.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Easy Clean Aquarium - 5 Gallon
(413)
$59.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® CN-S Corner Filter Cartridges
2 sizes
(48)
$8.99 - $14.99
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Buy 1 Get 2nd 50% Off all Aquatic Media
+ 3 more
Top Fin® Premium Aquarium Gravel - Black & Neon
3 sizes
(50)
$4.99 - $25.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Gravel Vacuum
4 sizes
(788)
$9.99 - $21.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Air Pump
3 sizes
(749)
$17.39 - $20.79
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Bowfront Aquarium Stand - 36 Gallon
(32)
$157.24
$184.99
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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.