Dive into fish deals

Valid thru 5/31*

Marine & Freshwater

(1127 results)
Aqueon Standard Glass Rectangle Aquarium
6 sizes
(368)
$13.49 - $99.99
Buy Any Open Glass Tank, Get 20% OFF Top Fin Glass Hood - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Essentials Aquarium Starter Kit
6 sizes
(4420)
$55.99 - $249.99
Free Same-Day Delivery, No Order Minimum!
Fluval® Plant & Shrimp Stratum Aquarium Substrate
3 sizes
(129)
$15.99 - $29.99
Earn 5,000 pts ($10 back in savings) when you spend $25+ on Aquatic Decor and Substrate. One-time use only.
Sign In & Enjoy Free Shipping Over $49
Top Fin® Large Power Filter Cartridges
(289)
$17.99
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
CaribSea Super Naturals Aquarium Sand - White
(33)
$19.99
$27.99
Earn 5,000 pts ($10 back in savings) when you spend $25+ on Aquatic Decor and Substrate. One-time use only.
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Freshwater Aquarium Master Test Kit
(445)
$35.99
$39.99
Buy 1, get the 2nd 25% OFF ALL API® food & water care products (excludes pond) thru 5/31
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(375)
$3.19 - $16.62
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Fluval® FX6 Aquarium Canister Filter
(223)
$369.99
$419.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® 36 Gallon Aquarium & Stand Ensemble Combo
(99)
$249.99
$399.99
$150 OFF Top Fin® 36 Gallon Aquarium & Stand Ensemble Combo
Marineland Open Glass Aquarium
3 sizes
(196)
$18.49 - $159.99
Buy Any Open Glass Tank, Get 20% OFF Top Fin Glass Hood - Online Only!
Save 50% on ALL Marineland® & Aqueon® open-glass aquariums thru 5/31
Fluval® 407 Performance Aquarium Canister Filter
(129)
$229.99
$269.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(487)
$155.99
$194.99
Free Same-Day Delivery, No Order Minimum!
Top Fin® Fascinate Column Starter Kit
(372)
$92.99
Free Same-Day Delivery, No Order Minimum!
Fluval AC Power Filter
4 sizes
(150)
$42.99 - $97.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Activ-Flora Floracor Black Planted Aquarium Substrate
(22)
$20.80
$24.99
Earn 5,000 pts ($10 back in savings) when you spend $25+ on Aquatic Decor and Substrate. One-time use only.
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Element EF-S Filter Cartridges
3 sizes
(382)
$8.99 - $17.99
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(238)
$8.99 - $17.99
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Aquarium Hinged Glass Lid
7 sizes
(293)
$16.99 - $58.99
Buy Any Open Glass Tank, Get 20% OFF Top Fin Glass Hood - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Nature's Ocean Live Nutri-Seawater
(32)
$20.50
$25.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Compact Aquarium Heater
3 sizes
(503)
$14.59 - $33.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Premium Aquarium Gravel - Classic Beach
(68)
$7.99
Earn 5,000 pts ($10 back in savings) when you spend $25+ on Aquatic Decor and Substrate. One-time use only.
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Internal Filter Cartridges
(34)
$7.99
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® CN-S Corner Filter Cartridges
2 sizes
(52)
$8.99 - $14.99
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(206)
$3.94 - $8.00
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1579)
$18.99 - $49.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Omega™One Frozen Blood Worms Fish Food
(208)
$8.99
$9.99
Buy 1, get the 2nd 25% OFF All frozen fish food thru 5/31
Free Same-Day Delivery, No Order Minimum!
Top Fin® Aquarium Air Pump
3 sizes
(783)
$17.39 - $20.79
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Seachem® Purigen® Premium Synthetic Absorbent
2 sizes
(60)
$9.19 - $15.79
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(530)
$2.28 - $37.58
Buy 1, get the 2nd 25% OFF ALL API® food & water care products (excludes pond) thru 5/31
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Quick Start Aquarium Cycling Water Conditioner
3 sizes
(306)
$8.68 - $17.38
Buy 1, get the 2nd 25% OFF ALL API® food & water care products (excludes pond) thru 5/31
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Gravel Vacuum
4 sizes
(830)
$9.99 - $21.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Premium Aquarium Gravel - Black & Neon
3 sizes
(60)
$4.99 - $25.99
Earn 5,000 pts ($10 back in savings) when you spend $25+ on Aquatic Decor and Substrate. One-time use only.
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(52)
$7.99 - $25.99
Earn 5,000 pts ($10 back in savings) when you spend $25+ on Aquatic Decor and Substrate. One-time use only.
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Sponge Filter
3 sizes
(212)
$9.99 - $19.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Omega™One Frozen Bloodworms Fish Food
(192)
$9.99
Buy 1, get the 2nd 25% OFF All frozen fish food thru 5/31
Free Same-Day Delivery, No Order Minimum!
Top Fin® Aquarium Airline Tubing
2 sizes
(102)
$4.99 - $7.69
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Silenstream Filter Cartridge - 3pk
(122)
$8.99
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Aquarium Salt
3 sizes
(193)
$8.78 - $112.48
Buy 1, get the 2nd 25% OFF ALL API® food & water care products (excludes pond) thru 5/31
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Tetra® 6 N 1 Aquarium Water Test Strips
(71)
$9.99
$11.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
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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.