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Essentials & more for your finned friends

Marine & Freshwater

(1078 results)
Top Fin® Essentials Aquarium Starter Kit
6 sizes
(4445)
$39.99 - $149.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Aqueon® Standard Glass Rectangle Aquarium
6 sizes
(382)
$13.49 - $99.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 50% on ALL Marineland® & Aqueon® open-glass aquariums thru 7/5, price displayed
+ 3 more
Fluval® Plant & Shrimp Stratum Aquarium Substrate
3 sizes
(133)
$15.99 - $31.49
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 2 more
API® Freshwater Aquarium Master Test Kit
(455)
$35.99
$39.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
CaribSea Super Naturals Aquarium Sand - White
(33)
$27.19
$27.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 2 more
Top Fin® Large Power Filter Cartridges
(292)
$17.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 3 more
Seachem® Prime® Aquarium Water Conditioner
4 sizes
(377)
$3.19 - $16.62
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Fluval® FX6 Aquarium Canister Filter
(224)
$406.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland® High Definition LED Ensemble - 75 Gallon
(590)
$449.99
$799.99
$350 OFF 75 gallon & 125 gallon ensembles, price displayed.
Buy any fish tank, get 20% OFF select substrate - Online Only!
Top Fin® Aquarium & Stand Ensemble - 36 Gallon
(99)
$199.99
$399.99
$200 OFF Top Fin® 36 Gallon Aquarium & Stand Ensemble Combo, price displayed
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 1 more
Marineland® Open Glass Aquarium
3 sizes
(207)
$18.49 - $159.99
Save 50% on ALL Marineland® & Aqueon® open-glass aquariums thru 7/5, price displayed
Buy Any Open Glass Tank, Get 20% OFF Top Fin Glass Hood - Online Only!
+ 1 more
Top Fin® Bow Front Aquarium Starter Kit -  36 Gallon
(491)
$116.99
$194.99
Buy any fish tank, get 20% OFF select substrate - Online Only!
Save 40% on ALL 20 gallon and above Essentials Starter Kits, price displayed
+ 2 more
Top Fin® Fascinate Column Aquarium Starter Kit
(372)
$46.49
$92.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Nature's Ocean Live Nutri-Seawater
(37)
$20.50
$25.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Silenstream™ Small Filter Cartridges
(65)
$14.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 4 more
Top Fin® PF-S Silenstream Aquarium Filter Cartridges
2 sizes
(238)
$8.99 - $17.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 4 more
Top Fin® Element EF-S Filter Cartridges
3 sizes
(384)
$8.99 - $17.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
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
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Top Fin® Aquarium Hinged Glass Lid
7 sizes
(314)
$16.99 - $58.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy Any Open Glass Tank, Get 20% OFF Top Fin Glass Hood - Online Only!
+ 3 more
Activ-Flora Floracor Black Planted Aquarium Substrate
(23)
$20.80
$24.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 2 more
Top Fin® Silenstream™ Aquarium Power Filter
5 sizes
(1588)
$18.99 - $49.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Compact Aquarium Heater
3 sizes
(507)
$14.59 - $33.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Premium Aquarium Gravel - Classic Beach
(68)
$7.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner
2 sizes
(210)
$3.94 - $8.00
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Seachem® Purigen® Premium Synthetic Absorbent
2 sizes
(62)
$9.19 - $15.79
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 3 more
Omega™One Frozen Blood Worms Fish Food
(208)
$8.99
$9.99
Free Same-Day Delivery, No Order Minimum!
API® Stress Coat Tap Water Aquarium Conditioner
6 sizes
(538)
$2.28 - $37.58
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
API® Guide Fish Problem Solving General Cure
(62)
$16.38
$23.49
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Aquarium Sponge Filter
3 sizes
(216)
$9.99 - $19.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Zoo Med Mopani Wood Aquarium & Terrarium Ornament
4 sizes
(209)
$4.09 - $54.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 2, get the 3rd FREE on all aquatic ornaments - Online Only!
+ 2 more
Top Fin® Premium Aquarium Gravel - Caribbean Sea Mix
2 sizes
(54)
$7.99 - $25.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
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
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy any fish tank, get 20% OFF select substrate - Online Only!
+ 3 more
Top Fin® Silenstream Filter Cartridge - 3pk
(122)
$8.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 3, Get the 4th FREE on All Aquatic Media - Online Only!
+ 4 more
Top Fin® Aquarium Water Conditioner
3 sizes
(259)
$4.99 - $9.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Top Fin food & watercare
+ 4 more
Tetra® 6-in-1 Aquarium Water Test Strips
(73)
$9.99
$11.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Buy 1, get the 2nd 25% OFF all Tetra food & watercare - Online Only!
+ 3 more
Hikari® Micro Pellets® Tropical Fish Food
(109)
$6.99
$8.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Save 35% On Your First Autoship Order!
+ 2 more
Top Fin® Aquarium Airline Tubing
2 sizes
(102)
$4.99 - $7.69
Save 15% when you spend $50+ on FREE Same-Day Delivery
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
Save 15% when you spend $50+ on FREE Same-Day Delivery
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 more
Top Fin® Artificial Realistic Leaf Aquarium Plant - 4"
(36)
$4.99
$5.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
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
Save 15% when you spend $50+ on FREE Same-Day Delivery
Earn 5X points (10% back in savings) on all Top Fin products!
+ 2 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.