Marine & Freshwater

(1159 results)
Aqueon Standard Glass Rectangle Aquarium
7 sizes
(279)
$12.49 - $94.99
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Marineland Open Glass Aquarium
3 sizes
(166)
$17.59 - $149.99
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Top Fin® Essentials Aquarium Starter Kit
8 sizes
(4233)
$34.99 - $191.99
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Top Fin® Large Power Filter Cartridges
(277)
$17.99
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+ 2 more
Fluval® Plant Stratum Aquarium Substrate
(121)
$23.69
$28.99
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Top Fin® Compact Aquarium Heater
3 sizes
(479)
$14.59 - $33.99
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Marineland® High Definition LED Ensemble - 75 Gallon
(570)
$549.99
$849.99
$300 Off Select 75 & 125 Gallon Ensembles!
Top Fin® 36 Gallon Aquarium & Stand Ensemble Combo
(70)
$299.99
$449.99
$150 Off Top Fin 36 Gallon Ensembles!
Fluval® 407 Performance Aquarium Canister Filter
(124)
$229.99
$269.99
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Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(466)
$155.99
$194.99
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Instant Ocean® Sea Salt
2 sizes
(83)
$21.19 - $52.99
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API® Freshwater Aquarium Master Test Kit
(293)
$35.99
$39.99
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Top Fin® Silenstream™ Small Filter Cartridges
(65)
$14.99
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Fluval Plant & Shrimp Stratum
(8)
$46.49
$49.99
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Top Fin® Fascinate Column Starter Kit
(310)
$44.99
$89.99
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CaribSea Super Naturals Aquarium Sand - Moonlight White
(102)
$19.99
$29.99
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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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Fluval AC Power Filter
4 sizes
(103)
$42.99 - $99.99
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Top Fin® Aquarium Hinged Glass Lid
7 sizes
(212)
$16.99 - $58.99
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Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(232)
$8.99 - $17.99
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Aqua Natural Aquarium Sand - Galaxy Black
2 sizes
(91)
$14.39 - $24.99
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Fluval® Submersible Aquarium Heater
(240)
$32.99 - $38.99
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CaribSea Super Naturals Aquarium Sand - White
(22)
$19.99
$27.99
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Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1497)
$18.99 - $49.99
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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
(369)
$8.99 - $17.99
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Top Fin® Premium Aquarium Gravel - Classic Beach
(66)
$7.99
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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
(66)
$14.39
$14.99
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Top Fin® Silenstream Filter Cartridge - 3pk
(111)
$8.99
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Omega™One Frozen Blood Worms Fish Food
(204)
$10.79
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Aqua Natural Aquarium Substrate - Gold Pearl
(17)
$5.59
$14.99
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Omega™One Frozen Bloodworms
(184)
$9.99
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GloFish® Aquarium Gravel
1 size 4 colors
(126)
$8.99
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Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(198)
$3.99 - $8.39
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Top Fin® Aquarium Airline Tubing
2 sizes
(96)
$4.99 - $7.69
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Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(45)
$7.99 - $25.99
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Zoo Med Mopani Wood Aquarium Ornament
4 sizes
(185)
$4.99 - $54.99
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B2G1 more Free Aquatic Ornaments excluding Glofish
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Omega™ One Frozen Brine Shrimp Fish Food
(90)
$6.99
$7.99
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Top Fin® Aquarium Sponge Filter
3 sizes
(204)
$9.99 - $19.99
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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.