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Marine & Freshwater

(1153 results)
Top Fin® Essentials Aquarium Starter Kit
8 sizes
(4260)
$55.99 - $191.99
Online Only! Save 20% on Select Habitats and Tanks.
Free Same-Day Delivery, No Order Minimum!
Aqueon Standard Glass Rectangle Aquarium
7 sizes
(297)
$11.49 - $94.99
Buy Any Open Glass Get 20% off Top Fin Glass Hood
Save 50% on Select Open Glass Aquariums!
+ 1 more
Fluval® FX6 Aquarium Canister Filter
(206)
$369.99
$419.99
Fluval® FX6 Performance Aquarium Canister Filter ONLY $369.99!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Large Power Filter Cartridges
(279)
$17.99
BOGO 50% Select Aquatic Filter Media
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland Open Glass Aquarium
3 sizes
(170)
$29.99 - $149.99
Buy Any Open Glass Get 20% off Top Fin Glass Hood
Save 50% on Select Open Glass Aquariums!
Top Fin® Fascinate Column Starter Kit
(312)
$71.99
$89.99
Online Only! Save 20% on Select Habitats and Tanks.
Free Same-Day Delivery, No Order Minimum!
Fluval® Plant Stratum Aquarium Substrate
(121)
$18.79
$28.99
Sign In & Enjoy Free Shipping Over $49
Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(234)
$8.99 - $17.99
BOGO 50% Select Aquatic Filter Media
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Compact Aquarium Heater
3 sizes
(487)
$14.59 - $33.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(369)
$3.79 - $16.69
SAVE 40% on your first Autoship order (max $20 savings) thru 12/14*
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland High-Definition LED Ensemble - 125G
(32)
$799.99
$999.99
Online Only! Save 20% on Select Habitats and Tanks.
Marineland® High Definition LED Ensemble - 75 Gallon
(570)
$639.99
$799.99
Online Only! Save 20% on Select Habitats and Tanks.
Save $300 on our 75 Gallon Ensemble!
Fluval® FX4 Aquarium Canister Filter
(126)
$309.99
$359.99
Fluval® FX4 Performance Aquarium Canister Filter ONLY $309.99!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Fluval® 407 Performance Aquarium Canister Filter
(124)
$229.99
$269.99
Fluval® 407 Performance Aquarium Canister Filter ONLY $229.99!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Fluval FX2 Aquarium Canister Filter
(36)
$269.99
$319.99
Fluval® FX2 Performance Aquarium Canister Filter ONLY $269.99!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® 36 Gallon Aquarium & Stand Ensemble Combo
(72)
$319.99
$399.99
Online Only! Save 20% on Select Habitats and Tanks.
Save $150 on our 36 Gallon Ensemble!
Fluval® 307 Performance Aquarium Canister Filter
(101)
$189.99
$199.99
Fluval® 307 Performance Aquarium Canister Filter ONLY $189.99!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(472)
$155.99
$194.99
Online Only! Save 20% on Select Habitats and Tanks.
Save 20% on Select Essential Starter Kits!
+ 2 more
Fluval® 207 Performance Aquarium Canister Filter
(81)
$152.99
$169.99
Fluval® 207 Performance Aquarium Canister Filter ONLY $152.99!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Captivate Starter Kit
(416)
$111.99
$134.99
Online Only! Save 20% on Select Habitats and Tanks.
Save 20% on Select Essential Starter Kits!
+ 2 more
Top Fin® Mystic Oak Finish Aquarium Stand
3 sizes
(40)
$59.99 - $139.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Instant Ocean® Sea Salt
2 sizes
(83)
$22.39 - $59.99
SAVE 40% on your first Autoship order (max $20 savings) thru 12/14*
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Freshwater Aquarium Master Test Kit
(295)
$35.99
$39.99
SAVE 40% on your first Autoship order (max $20 savings) thru 12/14*
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Fluval Plant & Shrimp Stratum
(8)
$36.99
$49.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
CaribSea Super Naturals Aquarium Sand - Moonlight White
(102)
$19.99
$29.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Fluval AC Power Filter
4 sizes
(111)
$42.99 - $99.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Aqua Natural Aquarium Sand - Galaxy Black
2 sizes
(91)
$14.39 - $24.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
CaribSea Super Naturals Aquarium Sand - White
(25)
$19.99
$27.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1511)
$18.99 - $49.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Fluval® Submersible Aquarium Heater
(242)
$32.99 - $38.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Element EF-S Filter Cartridges
3 sizes
(373)
$8.99 - $17.99
BOGO 50% Select Aquatic Filter Media
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Silenstream™ Small Filter Cartridges
(65)
$14.99
SAVE 40% on your first Autoship order (max $20 savings) thru 12/14*
BOGO 50% Select Aquatic Filter Media
+ 2 more
Top Fin® Aquarium Hinged Glass Lid
7 sizes
(218)
$16.99 - $58.99
Buy Any Open Glass Get 20% off Top Fin Glass Hood
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Corner Tank Aquarium Starter Kit - 6 Gallon
(348)
$63.99
$79.99
Online Only! Save 20% on Select Habitats and Tanks.
Free Same-Day Delivery, No Order Minimum!
Activ-Flora Floracor Black Planted Aquarium Substrate
(20)
$24.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Aqua Natural Aquarium Substrate - Gold Pearl
(21)
$5.59
$14.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
Top Fin® Premium Aquarium Gravel - Classic Beach
(66)
$7.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
API® E.M. Erythromycin Fish Bacterial Infection Treatment
(75)
$21.98
$25.08
SAVE 40% on your first Autoship order (max $20 savings) thru 12/14*
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Aqua Natural Aquarium Sand - White
(68)
$14.39
$14.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(361)
$2.29 - $37.58
SAVE 40% on your first Autoship order (max $20 savings) thru 12/14*
Free Same-Day Delivery, No Order Minimum!
+ 1 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.