Marine & Freshwater

(46 results)
Marineland Open Glass Aquarium
3 sizes
(126)
$24.99 - $194.99
Buy any Open Glass Tank Get 20% off any Top Fin Glass Hood
Buy Any Tank Get 20% off Entire Stock Substrate (excludes Gems)
Marineland® High Definition LED Ensemble - 75 Gallon
(604)
$499.99
$849.99
Buy Any Tank Get 20% off Entire Stock Substrate (excludes Gems)
Marineland High-Definition LED Ensemble - 125G
(26)
$999.99
Buy Any Tank Get 20% off Entire Stock Substrate (excludes Gems)
Marineland® Simple Modern LED Aquarium & Stand Ensemble - 45 Gallon
(137)
$349.99
$599.99
Buy Any Tank Get 20% off Entire Stock Substrate (excludes Gems)
Marineland® Modern LED Aquarium & Stand Ensemble - 60 Gallon
(503)
$649.99
$699.99
Buy Any Tank Get 20% off Entire Stock Substrate (excludes Gems)
Marineland Penguin PRO 375 Aquarium Power Filter
(207)
$64.99
$69.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland® Penguin Rite Size C Power Filter Cartridges
(92)
$19.99
$23.99
Save 35% On Your First Autoship Order!
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+ 4 more
Marineland® Emperor® PRO 450 Aquarium Filter
(100)
$94.99
$99.99
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+ 1 more
Marineland® C360 Aquarium Canister Filter
(383)
$216.29
$219.99
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+ 1 more
Marineland® Rite Size Emperor Power Filter Cartridge
(54)
$13.19
$15.59
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+ 4 more
Marineland® Black Diamond Carbon
(26)
$9.99
$24.99
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+ 4 more
Marineland® Penguin PRO 275 Aquarium Power Filter
(225)
$52.99
$54.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland® Magniflow C250 Aquarium Canister Filter - 55G
(244)
$159.99
$169.99
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+ 1 more
Marineland® Silicone Aquarium Sealant
(52)
$5.39
$7.19
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+ 1 more
Marineland Magnum 200 Polishing Internal Canister Filter
(20)
$59.99
$69.99
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Sign In & Enjoy Free Shipping Over $49
Marineland Penguin PRO 125 Aquarium Power Filter
(189)
$32.49
$34.99
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland Penguin PRO 175 Aquarium Power Filter
(194)
$43.19
$44.99
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+ 1 more
Marineland® Polishing Internal Filter
(227)
$92.99
$99.99
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+ 1 more
Marineland® Visi-Therm Submersible Aquarium Heater
(239)
$32.99 - $41.49
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Free Same-Day Delivery, No Order Minimum!
+ 1 more
Marineland® Hidden LED Lighting System
(126)
$42.49
$49.99
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+ 1 more
Marineland®  LED Aquarium Light Bar
(261)
$33.49
$46.99
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+ 1 more
Marineland® Carbon Filter Bags
(47)
$8.59
$12.99
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+ 4 more
Marineland® Penguin Rite Size B Power Filter Cartridges
(56)
$17.59
$19.99
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+ 4 more
Instant Ocean® Hold Fast Aquarium Bond Stick
(11)
$11.99
Save 15% when you spend $50+ on FREE Same-Day Delivery
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+ 1 more
Marineland® Magnum 200 Polishing Internal Filter Floss Sleeve
(0)
$4.79
$4.99
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+ 3 more
Marineland® 2-in-1 Bio-Foam & Pre-Filter - Fits 375 to 450
(26)
$5.79
$6.99
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Marineland® 2-in-1 Bio-Foam & Pre-Filter - Fits 125 to 275
(26)
$6.29
$7.59
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+ 4 more
Marineland® Maxi-Jet® 1200 Aquarium Water Pump and Power Head
(97)
$19.99
$39.99
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Marineland® C360 Polishing Filter Pads
(6)
$6.49
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+ 4 more
Marineland® C160/220 Polishing Filter Pads
(14)
$3.99
$5.09
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Marineland® C360 Filter Foam
(2)
$3.99
$12.99
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Marineland® Bio-Filter Balls
(4)
$4.99
$6.99
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Marineland® Filter Foam
(2)
$2.89
$8.99
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Marineland® Ceramic Rings
(4)
$5.79
$6.29
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Marineland® Penguin 100B Bio-Wheel Assembly
(12)
$9.79
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Marineland® Penguin 150B Bio-Wheel Assembly
(26)
$15.99
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Marineland® Penguin 200B/350B Bio-Wheel Assembly
(58)
$9.29
$11.99
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Marineland® Bio-Wheel Assembly
(6)
$16.99
$19.99
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+ 2 more
Marineland® Black Diamond Carbon
(6)
$22.79
$26.99
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+ 2 more
Marineland® White Diamond Carbon
(4)
$6.19
$9.99
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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.