April fish deals

Swim into savings on aquarium starter kits & aquatic media thru 5/3*

Marine & Freshwater

(1141 results)
Top Fin® Essentials Aquarium Starter Kit
8 sizes
(4401)
$34.99 - $191.99
Save 50% on ALL essential aquarium starter kits, 10 Gal & below
Buy any tank, get 20% OFF any substrate
+ 1 more
Aqueon Standard Glass Rectangle Aquarium
7 sizes
(355)
$13.49 - $99.99
Save 50% on ALL Aqueon® & Marineland® Open Glass Aquariums!
Buy any tank, get 20% OFF any substrate
+ 1 more
Top Fin® Large Power Filter Cartridges
(289)
$17.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 1, get the 2nd 50% OFF Select aquatic media - Mix & Match
+ 2 more
CaribSea Super Naturals Aquarium Sand - White
(33)
$19.99
$27.99
Buy any tank, get 20% OFF any substrate
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Fluval® Plant & Shrimp Stratum Aquarium Substrate
2 sizes
(125)
$18.79 - $36.99
Buy any tank, get 20% OFF any substrate
Sign In & Enjoy Free Shipping Over $49
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(375)
$3.19 - $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
(590)
$499.99
$799.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any tank, get 20% OFF any substrate
+ 1 more
Fluval® FX6 Aquarium Canister Filter
(222)
$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
(96)
$249.99
$399.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any tank, get 20% OFF any substrate
Marineland Open Glass Aquarium
3 sizes
(195)
$18.49 - $159.99
Save 50% on ALL Aqueon® & Marineland® Open Glass Aquariums!
Buy any tank, get 20% OFF any substrate
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(487)
$155.99
$194.99
Online Only! Save 20% on your purchase with code SAVE20
Save 20% OFF 20 Gallon & Above Top Fin Essentials Starter Kits
+ 2 more
Top Fin® Fascinate Column Starter Kit
(365)
$46.49
$92.99
Save 50% on ALL essential aquarium starter kits, 10 Gal & below
Buy any tank, get 20% OFF any substrate
+ 1 more
API® Freshwater Aquarium Master Test Kit
(441)
$35.99
$39.99
Save 35% On Your First Autoship Order!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Silenstream™ Small Filter Cartridges
(65)
$14.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 1, get the 2nd 50% OFF Select aquatic media - Mix & Match
+ 3 more
Activ-Flora Floracor Black Planted Aquarium Substrate
(22)
$20.80
$24.99
Buy any tank, get 20% OFF any substrate
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Nature's Ocean Live Nutri-Seawater
(32)
$20.50
$25.99
Save 35% On Your First Autoship Order!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Half Moon Aquarium - 3.5 Gallon
(2086)
$39.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any tank, get 20% OFF any substrate
+ 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 1, get the 2nd 50% OFF Select aquatic media - Mix & Match
+ 3 more
Top Fin® Compact Aquarium Heater
3 sizes
(499)
$14.59 - $33.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Element EF-S Filter Cartridges
3 sizes
(382)
$8.99 - $17.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 1, get the 2nd 50% OFF Select aquatic media - Mix & Match
+ 3 more
Top Fin® Aquarium Hinged Glass Lid
7 sizes
(279)
$16.99 - $58.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Fluval AC Power Filter
4 sizes
(149)
$42.99 - $97.99
Free Same-Day Delivery, No Order Minimum!
Sign In & Enjoy Free Shipping Over $49
CaribSea Aragonite Aragamax Select Substrate
(41)
$8.89
$16.99
Buy any tank, get 20% OFF any substrate
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Zoo Med Mopani Wood Aquarium Ornament
4 sizes
(208)
$4.09 - $54.99
Buy 2, Get the 3rd FREE Any Aquatic Ornaments - Mix & Match
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Premium Aquarium Gravel - Classic Beach
(68)
$7.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any tank, get 20% OFF any substrate
+ 2 more
Top Fin® Internal Filter Cartridges
(34)
$7.99
Online Only! Save 20% on your purchase with code SAVE20
Buy 1, get the 2nd 50% OFF Select aquatic media - Mix & Match
+ 3 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!
Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1571)
$18.99 - $49.99
Online Only! Save 20% on your purchase with code SAVE20
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
Save 35% On Your First Autoship Order!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Gravel Vacuum
4 sizes
(828)
$9.99 - $21.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Seachem® Purigen® Premium Synthetic Absorbent
2 sizes
(60)
$9.19 - $15.79
Buy 1, get the 2nd 50% OFF Select aquatic media - Mix & Match
Save 35% On Your First Autoship Order!
+ 2 more
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(516)
$2.28 - $37.58
Save 35% On Your First Autoship Order!
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Air Pump
3 sizes
(779)
$17.39 - $20.79
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Top Fin® Aquarium Sponge Filter
3 sizes
(212)
$9.99 - $19.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Omega™One Frozen Bloodworms Fish Food
(190)
$9.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
Omega™ One Frozen Brine Shrimp Fish Food
(98)
$9.99
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
Top Fin® Premium Aquarium Gravel - Black & Neon
3 sizes
(60)
$4.99 - $27.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any tank, get 20% OFF any substrate
+ 2 more
Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(52)
$7.99 - $27.99
Online Only! Save 20% on your purchase with code SAVE20
Buy any tank, get 20% OFF any substrate
+ 2 more
Top Fin® Aquarium Airline Tubing
2 sizes
(102)
$4.99 - $7.69
Online Only! Save 20% on your purchase with code SAVE20
Free Same-Day Delivery, No Order Minimum!
+ 1 more
API® Liquid Super Ick Cure
(160)
$6.99
Save 35% On Your First Autoship Order!
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.