Deals on fish & aquariums

Build your most beautiful underwater ecosystem yet

Marine & Freshwater

(184 results)
Royal Canin® Breed Health Nutrition® Golden Retriever Breed Specific Adult Dog Dry Food - 30 lb
(641)
$99.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Feline Health Nutrition Indoor Adult Dry Cat Food
3 sizes
(1960)
$23.99 - $67.99
Save 40% on your 1st Autoship Order!
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Royal Canin Size Health Nutrition X-Small Adult Dry Dog Food
(1014)
$59.99
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Royal Canin® Breed Health Nutrition® Labrador Retriever Breed Specific Adult Dog Dry Food - 30 lb
(930)
$99.99
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Royal Canin® Breed Health Nutrition® German Shepherd Breed Specific Adult Dog Dry Food
2 sizes
(988)
$79.99 - $99.99
Save 40% on your 1st Autoship Order!
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Royal Canin Size Health Nutrition Medium Breed Adult Dry Dog Food
3 sizes 1 flavor
(670)
$61.99 - $109.99
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Royal Canin® Breed Health Nutrition® Bulldog Breed Specific Adult Dog Dry Food
2 sizes 1 flavor
(736)
$79.99 - $99.99
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Royal Canin® Breed Health Nutrition® Yorkshire Terrier Breed Specific Adult Dog Dry Food
2 sizes 1 flavor
(1376)
$24.99 - $61.99
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Royal Canin® Breed Health Nutrition® Shih Tzu Breed Specific Adult Dog Dry Food
2 sizes
(952)
$24.99 - $61.99
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Royal Canin® Breed Health Nutrition® Poodle Breed Specific Adult Dog Dry Food
(475)
$61.99
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Royal Canin® Feline Health Nutrition Adult Instinctive Wet Cat Food - Thin Slices in Gravy, 3oz
(393)
$2.19
$2.29
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Royal Canin Canine Health Nutrition Adult Dog Wet Food - 13.5 oz
(322)
$3.89
$4.09
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Royal Canin® Feline Health Nutrition Instinctive Adult Loaf in Sauce Wet Cat Food - 3 Oz
(304)
$2.19
$2.29
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Royal Canin® Feline Health Nutrition Indoor Adult Wet Cat Food - 3 oz
(86)
$2.19
$2.29
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin Size Health Nutrition Large Breed Adult Dry Dog Food
3 sizes
(406)
$61.99 - $109.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Feline Care Nutrition Urinary Care Adult Dry Cat Food
2 sizes 1 flavor
(1480)
$28.99 - $79.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Breed Health Nutrition® French Bulldog Adult Dog Dry Food
2 sizes
(700)
$79.99 - $99.99
Save 40% on your 1st Autoship Order!
Earn 5,000 points ($10 back in savings) when you spend $60+ on dog food.
+ 2 more
Royal Canin® Weight Care Adult Dry Cat Food
3 sizes 1 flavor
(632)
$28.99 - $79.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
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Royal Canin Size Health Nutrition Large Breed Aging 8+ Senior Dog Dry Food - 30 lb
(149)
$109.99
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Royal Canin® Breed Health Nutrition® Dachshund Breed Specific Adult Dog Dry Food
(509)
$61.99
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Royal Canin® Breed Health Nutrition® Boxer Breed Specific Adult Dog Dry Food
2 sizes
(443)
$79.99 - $99.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Breed Health Nutrition® Miniature Schnauzer Breed Specific Adult Dog Dry Food - 10 lb
(494)
$61.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Feline Health Nutrition Kitten Dry Cat Food
4 sizes 1 flavor
(1994)
$25.99 - $73.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin Size Health Nutrition Giant Breed Adult Dog Dry Food - 30 lb
(148)
$99.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin Size Health Nutrition Large Breed Puppy Dog Dry Food
2 sizes 1 flavor
(502)
$73.99 - $109.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
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Royal Canin® Breed Health Nutrition® Chihuahua Breed Specific Adult Dog Dry Food
2 sizes
(1075)
$24.99 - $61.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
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Royal Canin® Breed Health Nutrition Rottweiler Breed Specific Adult Dog Dry Food - 30 lb
(107)
$99.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin Size Health Nutrition Small Breed Adult Dry Dog Food
2 sizes 1 flavor
(1126)
$19.99 - $99.99
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Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
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Royal Canin® Canine Care Nutrition Digestive Care Large Breed Adult Dog Dry Food - 30 lb
(91)
$109.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin Multi Function Urinary + Hydrolyzed Protein Adult Dry Dog Food
(93)
$112.99
Earn 5,000 points ($10 back in savings) when you spend $60+ on dog food.
Free Same-Day Delivery, No Order Minimum!
Royal Canin Size Health Nutrition Small Breed Puppy Dog Dry Food
3 sizes 1 flavor
(1413)
$23.99 - $109.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Feline Care Nutrition Indoor Hairball Care Adult Dry Cat Food
(396)
$79.99
$83.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Feline Health Nutrition Digestive Care Dry Cat Food
2 sizes 1 flavor
(729)
$28.99 - $42.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Canine Care Nutrition Weight Care Large Breed Adult Dog Dry Food - 30 lb
(73)
$109.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin Size Health Nutrition Medium Breed Puppy Dog Dry Food
2 sizes
(631)
$31.99 - $109.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Breed Health Nutrition® Golden Retriever Breed Specific Puppy Dog Dry Food - 30 lb
(350)
$104.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Breed Health Nutrition® Pug Breed Specific Adult Dog Dry Food - 10 lb
(277)
$61.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Feline Health Nutrition Sensitive Digestion Adult Dry Cat Food
2 sizes 1 flavor
(733)
$36.99 - $67.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin Size Health Nutrition Giant Breed Junior Puppy Dog Dry Food - 30 lb
(164)
$109.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 more
Royal Canin® Feline Breed Nutrition Maine Coon Adult Dry Cat Food
(448)
$45.99
$48.99
Save 40% on your 1st Autoship Order!
Earn a 5,000-point Reward Certificate when you get your second Autoship delivery by 11/30
+ 3 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.