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Everything you need for happy aquatic life

Marine & Freshwater

(1151 results)
Top Fin® Essentials Aquarium Starter Kit
8 sizes
(4285)
$34.99 - $191.99
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
Save 50% on Essential Starter Kits 10 Gallons & Below!
Aqueon Standard Glass Rectangle Aquarium
7 sizes
(301)
$12.49 - $132.99
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Buy Any Open Glass Tank, Get 20% off Top Fin Hoods & Lights!!
+ 2 more
Top Fin® Fascinate Column Starter Kit
(320)
$44.99
$89.99
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
Save 50% on Essential Starter Kits 10 Gallons & Below!
+ 1 more
Top Fin® Large Power Filter Cartridges
(281)
$17.99
Online Only! Save 20% on your purchase with code SAVE20
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+ 2 more
Fluval® Plant Stratum Aquarium Substrate
(123)
$18.79
$28.99
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+ 1 more
Marineland Open Glass Aquarium
2 sizes
(178)
$29.99 - $149.99
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Buy Any Open Glass Tank, Get 20% off Top Fin Hoods & Lights!!
+ 2 more
Top Fin® Compact Aquarium Heater
3 sizes
(491)
$14.59 - $33.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Premium Aquarium Gravel - Classic Beach
(66)
$7.99
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+ 2 more
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(369)
$3.79 - $16.69
Save 35% On Your First Autoship Order!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland® High Definition LED Ensemble - 75 Gallon
(572)
$499.99
$799.99
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+ 1 more
Top Fin® 36 Gallon Aquarium & Stand Ensemble Combo
(74)
$249.99
$399.99
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+ 1 more
Fluval® FX6 Aquarium Canister Filter
(212)
$419.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(474)
$155.99
$194.99
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Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
+ 2 more
Top Fin® Captivate Starter Kit
(418)
$107.99
$134.99
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+ 2 more
API® Freshwater Aquarium Master Test Kit
(295)
$35.99
$39.99
Buy 1 Get the 2nd for 25% Off on API Food & Watercare!
Save 35% On Your First Autoship Order!
+ 2 more
Fluval Plant & Shrimp Stratum
(8)
$36.99
$49.99
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Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
+ 2 more
Top Fin® Mystic Oak Finish Aquarium Stand
3 sizes
(48)
$59.99 - $89.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
CaribSea Super Naturals Aquarium Sand - Moonlight White
(102)
$19.99
$29.99
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+ 2 more
Fluval AC Power Filter
4 sizes
(117)
$42.99 - $99.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(234)
$8.99 - $17.99
Online Only! Save 20% on your purchase with code SAVE20
Online Only! Buy 3 Get the 4th FREE on Aquatic Media!
+ 3 more
Top Fin® Corner Tank Aquarium Starter Kit - 6 Gallon
(360)
$79.99
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
Free Same-Day Delivery, No Order Minimum!
Aqua Natural Aquarium Sand - Galaxy Black
2 sizes
(91)
$14.99 - $25.49
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
Free Same-Day Delivery, No Order Minimum!
+ 1 more
CaribSea Super Naturals Aquarium Sand - White
(25)
$19.99
$27.99
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+ 2 more
Top Fin® Aquarium Hinged Glass Lid
7 sizes
(237)
$16.99 - $58.99
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Buy Any Open Glass Tank, Get 20% off Top Fin Hoods & Lights!!
+ 2 more
Top Fin® Half Moon Aquarium - 3.5 Gallon
(2074)
$39.99
$44.99
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+ 3 more
Top Fin® Element EF-S Filter Cartridges
3 sizes
(375)
$8.99 - $17.99
Online Only! Save 20% on your purchase with code SAVE20
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+ 3 more
Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1521)
$18.99 - $49.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® E.M. Erythromycin Fish Bacterial Infection Treatment
(75)
$21.98
$25.08
Buy 1 Get the 2nd for 25% Off on API Food & Watercare!
Save 35% On Your First Autoship Order!
+ 2 more
Aqua Natural Aquarium Sand - White
(71)
$14.99
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Omega™One Frozen Blood Worms Fish Food
(208)
$8.99
Buy 1 Get the 2nd for 25% OFF All Frozen Fish Food!
Free Same-Day Delivery, No Order Minimum!
CaribSea Aragonite Aragamax Select Substrate
(38)
$8.89
$16.99
Online Only! Save 20% on your purchase with code SAVE20
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
+ 2 more
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(363)
$2.29 - $37.58
Buy 1 Get the 2nd for 25% Off on API Food & Watercare!
Save 35% On Your First Autoship Order!
+ 2 more
Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(198)
$3.99 - $8.39
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Gravel Vacuum
4 sizes
(814)
$9.99 - $21.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Air Pump
3 sizes
(769)
$17.39 - $20.79
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Aqua Natural Aquarium Substrate - Gold Pearl
(21)
$14.99
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Premium Aquarium Gravel - Black & Neon
3 sizes
(58)
$4.99 - $25.99
Online Only! Save 20% on your purchase with code SAVE20
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
+ 2 more
Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(47)
$7.99 - $25.99
Online Only! Save 20% on your purchase with code SAVE20
Buy Any Tank & Save 20% OFF All Substrate, Sand & Gravel! (excludes gems)
+ 2 more
Top Fin® Aquarium Sponge Filter
3 sizes
(206)
$9.99 - $19.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Silenstream Filter Cartridge - 3pk
(113)
$8.99
Online Only! Save 20% on your purchase with code SAVE20
Online Only! Buy 3 Get the 4th FREE on Aquatic Media!
+ 3 more
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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.