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Essentials & more for your finned friends

Marine & Freshwater

(1075 results)
Top Fin® Essentials Aquarium Starter Kit
6 sizes
(4444)
$39.99 - $199.99
Buy any fish tank, get 20% OFF select substrate - Online Only!
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Aqueon® Standard Glass Rectangle Aquarium
6 sizes
(382)
$13.49 - $99.99
Online Only - Save 50% on ALL Marineland & Aqueon open glass aquariums, price displayed
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 1 more
API® Freshwater Aquarium Master Test Kit
(455)
$35.99
$39.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Fluval® Plant & Shrimp Stratum Aquarium Substrate
3 sizes
(133)
$15.99 - $29.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 2 more
Top Fin® Large Power Filter Cartridges
(289)
$17.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 3 more
CaribSea Super Naturals Aquarium Sand - White
(33)
$27.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 2 more
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(377)
$3.19 - $16.62
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Fluval® FX6 Aquarium Canister Filter
(224)
$369.99
$419.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Aquarium & Stand Ensemble - 36 Gallon
(99)
$399.99
Online Only! Save 20% on your purchase with code SAVE20
75,000 points ($150 back in savings) when you buy a 36G Ensemble. One-time use only.
+ 2 more
Marineland® Open Glass Aquarium
3 sizes
(205)
$18.49 - $159.99
Online Only - Save 50% on ALL Marineland & Aqueon open glass aquariums, price displayed
Buy any fish tank, get 20% OFF select substrate - Online Only!
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(491)
$155.99
$194.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Top Fin® Fascinate Column Aquarium Starter Kit
(372)
$46.49
$92.99
Buy any fish tank, get 20% OFF select substrate - Online Only!
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Angled Aquarium -10 Gallon
(167)
$94.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 2 more
Nature's Ocean Live Nutri-Seawater
(35)
$20.50
$25.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Aquarium Hinged Glass Lid
7 sizes
(304)
$16.99 - $58.99
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(238)
$8.99 - $17.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 4 more
Top Fin® Half Moon Aquarium - 3.5 Gallon
(2096)
$39.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Activ-Flora Floracor Black Planted Aquarium Substrate
(23)
$20.80
$24.99
Buy any fish tank, get 20% OFF select substrate - Online Only!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Compact Aquarium Heater
3 sizes
(507)
$14.59 - $33.99
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1584)
$18.99 - $49.99
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Element EF-S Filter Cartridges
3 sizes
(384)
$8.99 - $17.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 3 more
Top Fin® Premium Aquarium Gravel - Classic Beach
(68)
$7.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 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
API® Guide Fish Problem Solving General Cure
(62)
$16.38
$23.49
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Seachem® Purigen® Premium Synthetic Absorbent
2 sizes
(62)
$9.19 - $15.79
Online Only! Save 20% on your purchase with code SAVE20
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 2 more
Omega™One Frozen Blood Worms Fish Food
(208)
$8.99
$9.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(538)
$2.28 - $37.58
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Aquarium Sponge Filter
3 sizes
(214)
$9.99 - $19.99
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(54)
$7.99 - $25.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Top Fin® Premium Aquarium Gravel - Black & Neon
3 sizes
(60)
$4.99 - $25.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Top Fin® Silenstream Filter Cartridge - 3pk
(122)
$8.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 3 more
Top Fin® Aquarium Water Conditioner
3 sizes
(259)
$4.99 - $9.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 3 more
Hikari® Micro Pellets® Tropical Fish Food
(109)
$6.99
$8.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Aquarium Airline Tubing
2 sizes
(102)
$4.99 - $7.69
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Floating Glass Aquarium Thermometer
(249)
$3.99
$4.99
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Artificial Striped Leaf Aquarium Plant - 8"
(56)
$5.99
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Fine Mesh Fish Net
(118)
$1.49
$2.49
Online Only! Save 20% on your purchase with code SAVE20
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Marineland® High-Definition LED Aquarim & Stand Ensemble - 125 Gallon
(55)
$999.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
Marineland® High Definition LED Ensemble - 75 Gallon
(590)
$499.99
$799.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 1 more
Fluval® FX4 Aquarium Canister Filter
(140)
$309.99
$359.99
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.