Marine & Freshwater

(37 results)
Tetra® Whisper Bio-Bag Disposable Filter Cartridge
2 sizes
(148)
$6.49 - $14.59
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+ 3 more
Tetra® Whisper IQ Power Aquarium Filter
5 sizes
(322)
$25.39 - $52.99
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Tetra® Whisper Aquarium Air Pump
4 sizes
(303)
$17.39 - $34.69
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+ 1 more
Tetra® TetraMin Tropical Flakes Fish Food
4 sizes
(285)
$3.89 - $47.89
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+ 2 more
Tetra HT Submersible Aquarium Heater
(491)
$15.27 - $23.99
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Tetra® 6 N 1 Aquarium Water Test Strips
(67)
$9.99
$11.99
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+ 1 more
TetraPro™ Tropical Crisps Fish Food Flakes
2 sizes
(73)
$7.99 - $16.49
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Tetra® Aquarium Lifeguard Halo Shield All-In-One-Treatment
(65)
$6.09
$16.49
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+ 1 more
Tetra BIO-Bag® Aquarium Cartridges
2 sizes
(46)
$4.79 - $12.99
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+ 3 more
Tetra® SafeStart Aquarium Cycling Water Conditioner
(106)
$10.49
$10.99
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+ 1 more
Tetra® EasyBalance Nitraban Aquarium Water Treatment
(69)
$13.87
$13.99
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+ 2 more
Tetra® Whisper In Tank Power Aquarium Filters
(34)
$26.19
$32.79
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+ 1 more
Tetra® Whisper In Tank Power Aquarium Filters
(180)
$15.99
$23.39
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+ 1 more
Tetra® AquaSafe Plus Aquarium Dechlorinator Water Conditioner
3 sizes
(170)
$7.99 - $17.29
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Tetra® Whisper Bio Bag 20-60 Filter Cartridges
2 sizes
(70)
$6.49 - $7.29
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+ 3 more
Tetra® TetraColor Tropical Fish Flakes
2 sizes
(173)
$7.99 - $14.89
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Tetra Whisper Bio Bag Filter Media 6 ct
(0)
$9.49
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TetraPro™ Tropical Color Crisps Fish Food Flakes
(88)
$3.99
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Tetra® Pond Water Garden Pump Pre-Filter
(2)
$11.39
$15.99
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+ 2 more
Tetra® Pond Tubing
(2)
$18.99
$20.59
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+ 1 more
Tetra® Pond Waterfall Filter
(7)
$64.99
$119.99
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Tetra® Pond Submersible Flat Box Filter
(2)
$17.99
$31.99
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Tetra® Pond Telescoping Pond Net
(0)
$15.99
$27.49
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Tetra® Pond Decorative Water Lily
(4)
$3.89
$5.99
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Tetra® Pond Filtration Fountain Kit
(3)
$44.99
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Tetra® Pro Pleco Wafers Algae Eaters Fish Food
(28)
$3.99
$11.99
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Tetra® Quick Dip Aquarium Water Test Kit
(8)
$6.79
$18.99
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Tetra® TetraVacation™ Slow Release Tropical Fish Feeder
(60)
$3.69
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+ 1 more
Tetra® TetraWeekend Slow Release Tropical Fish Feeder
(69)
$3.89
$5.99
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+ 2 more
Tetra® Whisper 3i In Tank Filter
(88)
$12.89
$18.99
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Tetra® Aquarium Algae Control
(22)
$6.49
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Tetra® WaterClarifier Aquarium Water Clarifier
(88)
$8.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Tetra® Whisper In Tank Power Aquarium Filters
(39)
$34.99
$42.29
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Tetra® TetraColor Tropical Granules Fish Food
(4)
$7.19
$13.09
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+ 1 more
Tetra® Marine Saltwater Flakes Fish Food
(4)
$13.99
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+ 1 more
Tetra® TetraPond ClearChoice PF-1 Biofiliter Replacement Pad
(2)
$13.59
$18.99
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+ 2 more
Tetra® TetraColor Tropical Fish Flakes
(112)
$4.39
$4.99
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+ 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.