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Fish & Aquariums


The One-Inch-Per-Gallon Rule Explained

Learn all about the one-inch-per-gallon rule for calculating how many adult fish you can have in your aquarium and discover the truth behind this rule of thumb.


10 Hardest Marine Fish to Care For

Here are some marine fish you will likely not own because of how hard they are to care for.


10 Best Tetras for a Community Aquarium

Find out which tetras are best for your community freshwater aquarium. Learn about tetras for 10-gallon tanks and bigger!


Introducing a Clownfish Pair

Clownfish are one of the more common saltwater aquarium fish. People like to keep them in pairs with anemones. It is important to pair them correctly because they may be aggressive to another clownfish.


Caring for Your Aquarium 101

Taking good care of your aquarium will help your aquatic pets live healthier and longer lives.


Top 5 Mistakes to Avoid as a Betta Fish Owner

There is more to your Betta fish than a 1.5-gallon bowl and a couple of decorations. Learn the mistakes that I made as a first-time Betta fish owner so that you won't make the same ones.


12 Ways to Increase Betta Fish Lifespan

Learn how long you can expect your betta fish to live and get some advice on how to increase the lifespan of your betta.


20 Best Tank Mates for Guppies

Discover 20 of the best tank mates for guppies in 10-gallon tanks and larger. Many fish are compatible with guppies, but you should choose their tank mates wisely.


Can You Keep Wild Fish as Pets in Your Home Aquarium?

Learn if it is possible to keep wild fish as pets, and find out whether or not it is smart to add them to your home aquarium.


Betta Tank Mates

A Betta fish is one of the most popular freshwater species in the aquarium hobby. Their gorgeous fins adorn the aqua theme. It is possible to keep a Betta with a community of fish in a large aquarium! Here is a list of suitable tank mates for your Betta fish.


How to Treat Nitrate Poisoning in Goldfish

This article is about how to treat nitrate poisoning in goldfish. Learn how to lower the nitrate level in your tank or pond and cure your goldfish.


6 Reasons Not to Have Pet Fish

Keeping fish can be a fun and fascinating experience. However, they are not suitable pets for everyone. This article looks at six challenges associated with keeping pet fish.


Why Do Aquarium Fish Chase Each Other?

Learn why fish chase each other in aquariums and find out how you can prevent this behavior while restoring peace and tranquility to your fish tank.


Cory Catfish Care Guide: Tank Mates, Behavior, and FAQ

Learn how to care for cory catfish in your tropical aquarium. These energetic little bottom feeders make a great addition to your freshwater fish tank and even serve as part of the cleanup crew that keeps your tank clean.


Top 10 Betta Fish Facts and Tips for Beginners

Learn about important betta fish facts every new betta keeper should know before bringing their fish home. Find out why surviving is not the same as thriving for these beautiful fish!


How Big Do Endlers Get?

Pure male Endlers are smaller than pure female Endlers. Hybrid Endler males can grow to nearly the same size as females. Read more about these fish and learn tips on breeding them and how many to put in a tank.


Why Is Your Betta Fish Losing Scales?

This article is about the reasons for the loss of scales in betta fish. Read on to know how to deal with the problem and how to prevent it in the future.


Why Is Your Betta Fish Breathing Heavily After a Water Change?

In this article, I have described a number of reasons that might be causing your betta fish to breathe heavily or gasp for air after you change the water.


Is the Endlers Livebearer Really a Guppy?

Those who have had the opportunity to keep pure N class Endlers usually report that not only do Endlers have a different body shape and color patterns, but they also exhibit different behavioral patterns than guppies.


What Are Endlers?

Endlers were first discovered in Venezuela in 1937. This unique fish was forgotten until it was rediscovered by Dr. John Endler in 1975. Dr. Endler was first attracted to Endlers due to their beautiful, metallic green coloration.


20 Best Neon Tetra Tank Mates

Learn which tank mates are best for neon tetras in a 10, 20, or 55-gallon freshwater aquarium—or bigger. Neons can live with many compatible species, but some are better than others.


How Difficult Is It to Care for Axolotls?

It's important to know if axolotls are hard to take care of before you decide to get one as a pet. This article explains what you will need to look after an axolotl, including what aquarium, filter, and food to buy.


5 Common Misconceptions About Goldfish

There are many misconceptions about goldfish care that result in inadequate care and shortened lifespans. This article will go over five of the most common misconceptions in addition to providing examples of proper care.


7 Popular Fish Most Aquarium Owners Should Avoid

Here are several common aquarium fish you should avoid. Some fish just don’t belong in home aquariums.


5 Common Betta Fish Myths, Mistakes, and Misconceptions

These mistakes, myths and common misconceptions have helped make the betta one of the most exploited fish in the aquarium trade.


What Do Betta Fish Eat? A Betta Feeding Guide for Beginners

Learn what betta fish eat and how much and how often to feed your betta. Proper feeding is an important but often overlooked aspect of betta fish care.


25 Best Angelfish Tank Mates for a Community Aquarium

Learn about the best tank mates for angelfish and find out which fish can live with freshwater angelfish in a community aquarium.


10 Signs of Stress in Tropical Fish (And What to Do About It)

Here is how to find out if the fish in your freshwater aquarium are stressed out. Stress leads to death, so watch for these signs and learn how to help your fish live long, happy, peaceful lives.


10 Best Schooling Fish for a Freshwater Aquarium

Learn about the best small and large schooling fish for your freshwater fish tank and find out which are appropriate for 10, 20, or 55-gallon aquariums or bigger.


Why Are My Guppies' Eyes Black? Here Are 4 Causes

Have your guppy's eyes suddenly turned black? There are four reasons why this happens. Learn them all in this quick guide.


The Best Aquatic Plants for Shrimp

Live plants help keep the fish in your underwater world happy and healthy. This is a list of the best aquatic plants for the freshwater shrimp that help keep the aquarium clean. These little invertebrates will play and chew on those green leaves.


Common Plecostomus Fish Care, Size, Tank Mates, and Lifespan

The plecostomas, or sucker fish, is a popular freshwater catfish with special care considerations. Learn the facts before you stock this often misunderstood fish.


10 Best Large Fish for a Freshwater Aquarium

Here are the 10 best (and worst) large fish for your freshwater home aquarium along with recommendations for tank size and care management. Big freshwater fish look spectacular in the right tank setup, but choose wisely.


Can Guppies Have Babies Without a Male?

While a female guppy can't get pregnant without a male guppy, it may appear that it is possible. Learn why that is and read more about how guppies give birth and how to care for baby guppies (or fry).


13 Safe and Compatible Betta Fish Tank Mates

The Siamese fighting fish, or betta, is a beautiful, solitary creature that gets quite nippy with other fish. But there are some species of fish that can cohabitate with bettas in a community tank. Here is a comprehensive guide to finding other fish that can live with bettas.


Easy and Best Aquarium Plants

What comes to mind when someone mentions a visually stunning aquarium? You probably envision a tank with exotic species of fish swimming around eye-catching plants. This article will show you which plants are the best of the lot.


Saltwater Aquarium Fish for Beginners

Here are the best saltwater fish to get for your aquarium if you're just starting out. There are many species and colors available, from clownfish to coral beauty.


Do Betta Fish Get Lonely and Bored?

Find out what to do if your betta fish looks lonely or bored and whether you should worry when your betta lives alone.


Top Floating Aquarium Plants

You can't have a thriving ecosystem without the right aquarium plants. Here are some of the best floating plants for your aquarium, including the red root floater and Java moss.


Freshwater Angelfish Care, Tank Mates, and FAQ

Everything you need to know about freshwater angelfish including care, best tank mate recommendations, and tank size, as well as answers to many frequently asked questions.


Aquarium-Cleaning Fish

Algae is a normal part of any aquarium ecosystem, but it has to be kept in small quantities for other living things to thrive in the same environment. That's why you need to add some algae-eaters to your tank to make sure that the algae doesn't spread too much.


Freshwater Aquarium Snails

Aquatic snails are a great addition to any freshwater tank. They work hard to clean the aquarium by feeding on algae, fish waste, and other debris. Snails are pretty to look at too, and you can't have a serious aquarium without them.


10 Types of Catfish for a Freshwater Aquarium

Check out the best types of freshwater catfish for the home aquarium, including small catfish for small tanks, and others that grow to several feet in length.


Why You Should Not Keep a Betta Fish in a Bowl

There are many misconceptions about betta fish, one of them being that a fishbowl is the best habitat for them. If properly taken care of, they can live from 3 to 5 years. This article will explain why bettas should not live in a bowl or vase and offer some other helpful tips.


How to Pick a Safe Location for Your Aquarium

There's nothing worse than a shattered aquarium and fish flopping around on the floor. There are many ways for accidents to happen, but knowing the most common dangers could keep your pets safe for life.


How to Take Care of Live Plants in Your Aquarium

All you need for aquascaping is a few plants and an understanding of what they need to thrive.


How to Maintain an Aquarium's Nitrogen Cycle

Every aquarium has a nitrogen cycle. How well it is managed determines the difference between a healthy tank or dead fish. Here's how to give your pets the best quality water and a happy life.


How and When Do Betta Fish Sleep?

Learn how and when betta fish sleep and discover a few ways you can make your betta’s tank more sleep-friendly so he can get all the rest he needs.


Can You Turn Off an Aquarium Filter at Night?

Find out whether it is safe to turn off your fish tank filter at night. Learn if your fish will die overnight, and the difference between a filter and an air pump.