Marine & Freshwater

(45 results)
Marineland Open Glass Aquarium
3 sizes
(184)
$18.49 - $159.99
Save 50% on ALL Aqueon & Marineland Open Glass Aquariums!
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Marineland® High Definition LED Ensemble - 75 Gallon
(584)
$499.99
$799.99
Online Only! Save 20% on your purchase with code SAVE20
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Marineland High-Definition LED Ensemble - 125G
(41)
$999.99
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Marineland Penguin PRO 375 Aquarium Power Filter
(144)
$64.99
$69.99
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Marineland® Penguin Rite Size C Power Filter Cartridges
(84)
$19.97
$23.99
Buy 1 Get the 2nd 50% OFF Select Aquatic Media!
Save 35% On Your First Autoship Order!
+ 2 more
Marineland® Modern LED Aquarium & Stand Ensemble - 60 Gallon
(509)
$649.99
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Marineland® Emperor® PRO 450 Aquarium Filter
(52)
$94.99
$99.99
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Marineland® Black Diamond Carbon
(24)
$9.99
$24.99
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Buy 1 Get the 2nd 50% OFF Select Aquatic Media!
+ 3 more
Marineland® Penguin PRO 275 Aquarium Power Filter
(160)
$51.27
$56.79
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Marineland® Magniflow C250 Aquarium Canister Filter - 55G
(148)
$155.57
$227.39
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Marineland® Silicone Aquarium Sealant
(56)
$5.39
$7.19
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+ 1 more
Marineland® Rite Size Emperor Power Filter Cartridge
(32)
$12.77
$15.59
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+ 2 more
Marineland® Polishing Internal Filter
(52)
$92.99
$99.99
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Marineland® Visi-Therm Submersible Aquarium Heater
(245)
$32.97 - $41.49
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Marineland® Hidden LED Lighting System
(58)
$49.99
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Marineland®  LED Aquarium Light Bar
(125)
$46.99
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Marineland® C360 Aquarium Canister Filter
(198)
$216.27
$311.29
Free Same-Day Delivery, No Order Minimum!
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Marineland Magnum 200 Polishing Internal Canister Filter
(22)
$55.22
$69.99
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Marineland Penguin PRO 175 Aquarium Power Filter
(128)
$43.17
$48.29
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Marineland® Maxi-Jet® 1200 Aquarium Water Pump and Power Head
(19)
$19.79
$39.99
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Marineland® Carbon Filter Bags
(12)
$8.09
$12.99
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Buy 1 Get the 2nd 50% OFF Select Aquatic Media!
+ 3 more
Marineland® Penguin Rite Size B Power Filter Cartridges
(34)
$17.57
$19.99
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+ 2 more
Instant Ocean® Hold Fast Aquarium Bond Stick
(11)
$11.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland® Magnum 200 Polishing Internal Filter Floss Sleeve
(0)
$4.79
$4.99
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+ 3 more
Marineland Penguin PRO 125 Aquarium Power Filter
(125)
$33.92
$37.49
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Marineland® 2-in-1 Bio-Foam & Pre-Filter - Fits 375 to 450
(28)
$5.79
$6.99
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+ 3 more
Marineland® 2-in-1 Bio-Foam & Pre-Filter - Fits 125 to 275
(26)
$5.29
$7.59
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+ 3 more
Marineland® C360 Polishing Filter Pads
(3)
$6.49
$7.79
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+ 3 more
Marineland® C160/220 Polishing Filter Pads
(8)
$3.99
$5.09
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+ 3 more
Marineland® C360 Filter Foam
(2)
$3.59
$12.99
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Buy 1 Get the 2nd 50% OFF Select Aquatic Media!
+ 3 more
Marineland® Bio-Filter Balls
(4)
$4.99
$6.99
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+ 1 more
Marineland® Filter Foam
(2)
$2.89
$8.99
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+ 1 more
Marineland® Ceramic Rings
(4)
$5.79
$6.29
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+ 1 more
Marineland® Penguin 100B Bio-Wheel Assembly
(12)
$9.79
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+ 1 more
Marineland® Penguin 150B Bio-Wheel Assembly
(2)
$15.99
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+ 1 more
Marineland® Penguin 200B/350B Bio-Wheel Assembly
(10)
$9.29
$14.99
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+ 1 more
Marineland® Bio-Wheel Assembly
(4)
$16.99
$19.99
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+ 1 more
Marineland® Black Diamond Carbon
(2)
$22.69
$26.99
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+ 1 more
Marineland® White Diamond Carbon
(4)
$6.19
$9.99
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+ 1 more
Marineland® Premium Carbon-Ammonia Neutralizing Blend
(10)
$12.99
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+ 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.