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8 Steps to the Perfect Aquarium
Our free guide can help keep your tank clean and your fish healthy. Get it free when you sign up for the Spruce Pets!
How to Care for Freshwater Fish
Get tips on caring for your freshwater fish and maintaining your freshwater aquarium.
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![Yellow and white koi fish swimming near water surface]()
Koi: Fish Species Profile -
![Koi in koi pond]()
A Comprehensive Guide to Koi Ponds -
![Pepper corydora sifting through substrate]()
11 Top Catfish Species for Your Aquarium -
![Carinotetraodon travancoricus]()
Pea Puffer: Fish Species Profile -
![Amano shrimp sitting on a plant]()
Amano Shrimp Species Profile -
![Bruising and scale loss secondary to fish flashing]()
Flashing in Aquarium Fish -
![Freshwater fish tank decorated with live and fake plants]()
Freshwater Aquarium Fish Diseases -
![Two Pictus catfish in an aquarium]()
Pictus Catfish Species Profile -
![Neon goby on stone coral]()
Neon Goby Fish Species Profile -
![Guppy with fuzzy growth on dorsal fin]()
How to Treat Cotton Wool Disease in Freshwater Fish -
![Goldfish bubbles]()
How to Treat Gas Bubble Disease in Freshwater Fish -
![German Blue Ram]()
German Blue Ram Species Profile -
![A 15 year old comet goldfish in a 100 gallon tank]()
Comet Goldfish Species Profile -
![Oscar cichlid]()
Oscar Fish Species Profile -
![Suckermouth catfish resting on gravel]()
Suckermouth Catfish Species Profile -
![Guppy male and female]()
Guppy Fish Species Profile
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![Swordtail fish profile]()
Swordtail Fish Species Profile -
![two silver arowena fish in water]()
Silver Arowana Fish Species Profile -
![fish name ideas]()
57 Great Name Ideas for Your Pet Fish -
![Orange fish swimming in glass fishbowl]()
How to Clean a Fishbowl -
![Aquarium with cichlids fish from lake malawi]()
How to Stock an Aquarium With Different Levels of Fish -
![Dropsy in a betta]()
Dropsy in Aquarium Fish -
![goldfish in aquarium]()
How to Treat Swim Bladder Disorder in Aquarium Fish -
![Blood parrot showing small mouth]()
Blood Parrot Cichlid Fish Species -
![Fishbowl and an aquarium on a sideboard]()
How to Determine the Sex of Your Fish -
![Aquarium with blue, orange and blue-striped fish swimming in front of underwater leaves]()
Guidelines for Stocking Your Aquarium -
![Guppies]()
Hard Water and Aquarium Fish -
![Tanichthys alboneubes known as White Cloud Mountain Minnow]()
White Cloud Mountain Minnow Fish Species Profile -
![An aquarium lit dynamically by LED lights]()
Aquarium Lighting Basics: the Case for LED Fixtures -
![Lovely little girl admiring fish in aquarium]()
Buying an Aquarium for a Child or Teen -
![Goldfish swimming in tank]()
Water Changes in Your Aquarium -
![Oscar fish eating worm]()
Feeding Your Fish Live Food
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In this section
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![golden barb (schuberti barb, puntius semifasciolatus) in a home aquarium]()
Barb Species Habitat and Care Information -
![aquarium tank]()
How Size Affects Aquarium Weight -
![Goldfish Swimming In Aquarium]()
How and Why You Should Seed a New Aquarium -
![Pool test kit]()
Difference Between Chlorine and Chloramine -
![mini aquatic plants landscape for sale]()
Lighting Requirements for Plants in Community Aquariums -
![Leaffish]()
South American Leaffish Species Profile -
![Stunning red killifish swimming in an aquarium.]()
Guide to Killifish -
![Fishes eating in aquarium]()
Feeding Your Aquarium Fish the Right Type of Food -
![Girl using a chemical test kit to measure the quality of water in a home aquarium]()
Aquarium Water Factors to Control for Healthy Fish -
![beautiful planted freshwater aquarium]()
Using Live Plants in Your Home Aquarium -
![dwarf gourami]()
Dwarf Gourami (Flame Gourami) Fish Species Profile -
![Black widow tetra]()
Black Widow Tetra Fish Species Profile -
![Puntius nigrofasciatus - Black Ruby Barb]()
Black Ruby Barb (Purple-Headed Barb) Fish Species Profile -
![bubbles on top of fish tank]()
Bubbles on Aquarium Water: Causes and Cures -
![Amoeba]()
How to Culture Your Own Infusoria at Home -
![Pebbles on a river bed. Reflections and ripples on the surface.]()
Can I Use Outdoor Gravel or Rocks in an Aquarium?
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![Fish swimming in an aquarium tank]()
The Anatomy of Fish -
![Botia lohachata - Yo Yo Loach]()
Yoyo Loach Fish Species Profile -
![Buenos Aires Tetra]()
Buenos Aires Tetra Fish Species Profile -
![Close-Up Of Fish In Dirty Tank]()
What Is Old Tank Syndrome? -
![Clown loach]()
Clown Loach Fish Species Profile -
![Harlequin Rasbora - Trigonostigma heteromorpha]()
Harlequin Rasbora (Red Rasbora) Fish Breed Profile -
![Portrait of goldfish in a bowl]()
How to Preserve the Slime Coat on Fish -
![Bristlenose Catfish]()
Bristlenose Pleco Fish Species Profile -
![Nutrafin Aquarium Water Test Kit]()
How to Test the Water in Your Fish Tank -
![Serpae Tetra - Hyphessobrycon eques]()
Serpae Tetra Fish Species Profile -
![Goldfish in an aquarium]()
Are Aquariums Safe? -
![Texas cichlid (Herichthys carpintus) underwater, side view]()
Texas Cichlid (Rio Grande Perch) Fish Species Profile -
![Helostoma temminckii - Kissing Gourami]()
Kissing Gourami (Kisser Fish) Species Profile -
![Schreitmuller's silver dollar (Metynnis hypsauchen), side view]()
Silver Dollar Fish Species Profile -
![Feeding goldfish in the aquarium at home. Fish rock and plants in the background]()
Fish Food Nutrition and Vitamins 101 -
![Killifish Fry]()
Culling Aquarium Fish
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