Fish Blog

If you’re looking to swim with the big fish… or the small fish… or anything in between, our in-depth Fish Blog section covers everything an avid aquarist needs to know.

Covering all types of aquarium tanks, to cool and interesting ideas for your next fishy endeavor, PetGuide.com’s Fish Blog is the perfect spot for experienced and beginner fish enthusiasts alike. We cover the various aspects of fish keeping as a hobby – from simple planted tanks to complex marine environments, as well as aquarium fish and their compatibility with other species. Dive right into the fascinating world of aquariums!

If you are in need for some tips and ideas on decorating your fish tank with beautiful plants, make sure to hop on over to our Aquatic Plants section. In case you have a saltwater tank and want to create a unique environment for its inhabitants, Coral Reefing is definitely an option worth looking into. Reef tanks are not only great for the fish but a magnificent centerpiece for your home as well! Depending on the type of water in your tank, you will also find invaluable advice and how-to guides in our Freshwater and Saltwater blog chapters, or useful reviews of aquarium equipment in our Fish Products section of the blog.

Wondering about adding a new creature into your aquarium? Read up on our aquarium fish species recommendations, or head on over to our Invertebrates blog, to find out how to chose, introduce and care for various marine critters, including species such as crabs, clams, starfish, and much more.

Create a stunning miniature ecosystem in your aquarium. Petguide.com’s Fish blog has all the resources you’ll need to create, decorate and maintain a gorgeous fish tank, as well as guides on choosing and caring for aquarium fish and other aquatic creatures that will inhabit it!

Plecostomus

The Plecostomus is a type of armored catfish that is found throughout the tropical regions of northeastern South America.

Grunts

Grunts are a family of saltwater fish made up of 150 different sub-species, some of which have been successfully introduced to the aquarium hobby.

5 Fish Questions You Always Wanted to Ask

There's no such thing as a stupid question. But if you're too hesitant to raise your hand, here are 5 fish questions you always wanted to ask.

How to Tell If Aquarium Hobby Right for You

Keeping an aquarium is fun and rewarding - it also takes work. Do you have what it takes to dive into the aquarium hobby?

Best Aquarium Testing Supplies

Depending on what kind of fish you're stocking your tank with, you're going to need to test the water to make sure it's just right. Here are the best aquarium testing supplies to help you out.

Best Aquarium Stands and Cabinets

You can't just put a full aquarium on any piece of furniture - it has to be made to take the weight of your tank. Here are our picks for awesome aquarium stands and cabinets.

Are You Feelin’ Crabby?

Are you a tank owner who's always wanted to bring home a crab? If you're ready to jump into the world of crabs, take a pinch of our tested advice.

Best Aquarium Kits for Beginners

You want to get an aquarium, but you don't know where to start. Not to worry - we've compiled a list of the best aquarium kits for beginners.

Fish Flushing: Why Toilet Funerals Need To Go

We have all gathered around the toilet to say our farewells to fish that have gone belly up. But this practice needs to stop for a variety of reasons.

Angelfish

Angelfish are one of the most popular species of freshwater fish in the aquarium hobby. They are characterized by their vertically compressed bodies.

Best Supplies for a Betta Fish Tank

Known for their bright colors and long, flowing tails, betta fish are a great option if you're looking for a way to break into the aquarium hobby.

Finding Dory: The True Tail Behind the Regal Tang Fish

Thanks to Hollywood, the new must-have fish to have is the Regal Tang. But this isn't a fish for the faint hearted - are you up to the challenge?

Rasbora

Rasboras are a family of minnow-type freshwater fish characterized by their small bodies and vibrant colorations. They are an extremely peaceful fish.

Danios

Danios are a popular species of freshwater fish in the aquarium hobby. They are characterized by two pairs of long barbells that hang from their mouth.

Best Foreground Plants to Use in a Planted Tank

Much thought and planning goes into a vibrant, practical planted tank. Learn how to properly arrange your plants and which ones are best for the foreground.

Tank Stocking: The Truth About The 1 Inch Per Gallon Rule

You've heard about the "one inch of fish per gallon" rule, but there are other factors to keep in mind when you're first stocking your aquarium.

Boxfish

Known as trunkfish, cowfish and cofferfish; boxfish are a family of bony marine fish. They are known for their square shaped body and heavy armored scales.

Hop to It: My Introduction to African Dwarf Frogs

When your child's school sends her home with a new amphibian friend, you've got to adapt your aquarium to suit the little jumper's needs - ASAP!

Understanding the Basics of Freshwater Aquarium Lighting

The right lights make all the difference to your freshwater aquarium. Offering much more than just illumination, aquarium lighting helps feed your plants.

7 Common Types of Algae Found in Freshwater Aquariums

It's not easy being green... or brown... or red. How many different types of freshwater algae are you familiar with and how to you control it?

Top 8 Best Aquarium Plants for Beginners

Welcome to the wonderful world of planted tanks! If you're just getting started, we've made a list of eight aquarium plants that are great for beginners.

Why You Need The API Master Test Kit

Here's a test you don't have to study for. The API Master Test Kit has everything you need to maintain and monitor aquarium conditions.

Butterflyfish

Butterflyfish are a family of saltwater fish made up of over 100 distinct species. They resemble angelfish and have compressed, disk shaped bodies.

Wrasse

Wrasse are large family of saltwater fish made up of over 600 different species. They are also one of the most popular species of marine aquarium fish.

Gobies

Gobies are one of the largest families of fish comprised of over 2000 separate species. Most species rarely grow more than a couple of inches in length.

Best Saltwater Aquarium Kit

A saltwater aquarium kit lets you create a gorgeous tank without much hassle - they contain everything you need to get started.

Best Medications for Treating Aquarium Fish Diseases

Just like any pet, fish can get sick too. But how can you fight illness in your tank? Here's our list of the best medications for treating aquarium fish diseases.

Halfbeak

Halfbeak fish are a type of marine and brackish water fish belonging to the family Hemiramphidae. They are a little less colorful than some marine species.

African Tiger Fish

African Tiger Fish are a large and predatory species of fish. Their bodies are powerful and streamlined, enabling them to move with fast bursts of speed.

Tips for Converting From a Fish-Only to a Planted Tank

You've decided to make a change from a fish-only to a planted tank. When you're ready to add live plants to the mix, here are some tips you should follow.

Best Aquarium Maintenance Supplies

Your tank is perfect - but how do you keep it that way? You need the right aquarium maintenance supplies to keep it looking its best.

The Benefits of Hermit Crabs in Your Aquarium

The hermit crab isn't just a pretty shell - this invertebrate likes to clean up after itself. Here's why you should let a hermit crab move into your tank.

Above the Water’s Surface: A Guide to Emersed Plant Growth

A different take on planted tanks, emersed plant life gives your aquarium dimension. Let's talk about the ins and outs of emersed aquarium plants.

Biotope Tanks: What Are They and How Do You Cultivate One?

Before you buy, have you narrowed down your choice of fish tank? If you're looking into freshwater, the Biotope tank may be just what you're looking for.

Tigerfish

The Tigerfish is a type of freshwater fish belonging to the genus Datnioides (Datnoids). It's named for the vertical stripes that run all along its body.

Product Review: AquaMaxx HOB Protein Skimmer

Let us clarify how important a quality protein skimmer is to your tank. We give the AquaMaxx HOB Protein Skimmer a spin in our aquarium.

Mandarinfish

Sometimes referred to as dragonets or mandarinfish, mandarins are small, brightly colored saltwater fish belonging to the Synchiropus genus.

6 Easy Hacks to Cure Fish Boredom

Just like any other pet, fish can become bored, too. And while they won't chew up your shoes, keeping them occupied will ensure they live a healthier life.

Pipefish

Pipefish are a species of saltwater fish related to seahorses. However, the pipefish's body, unlike the seahorse's, is long, straight and snake-like.

Bichirs

Bichirs are a species of freshwater fish. They are characterized by their long, eel-like bodies and unique dorsal finlets. Capable of breathing surface air.

Silver Dollar

Silver dollars are an extremely popular species of freshwater fish. They get their name from their almost round shaped bodies and silver coloring.

Snappers

Snappers are generally non-aggressive fish that do well in very large saltwater community tanks. Most live in rocky or coral reefs, and come in many colors.

Neon Tetra

The Neon tetra is an incredibly beautiful species of tropical freshwater aquarium fish. Neon tetras usually grow up to around 1.2 inches in length.

Hogfish

Hogfish are a reef-dwelling species of wrasse popular in the modern aquarium trade. They possess a long, pig-like snout they use to search for food.

Best LED Aquarium Lighting Systems

What is the one thing that can immediately transform the look of a home aquarium? The right LED aquarium lighting system.

Best Freeze-Dried Fish Foods

We're going to explore the subject of freeze-dried fish food in greater depth. You'll learn how to choose freeze-dried fish food, how best to feed it, and our top picks.

Best Products to Remove Aquarium Algae

It's completely natural, but it sure does make your tank look gross! Here are the best products to remove aquarium algae.

Oscars and Aquarium Plants: Can You Have Both?

Some fish and aquarium plants don't go together. If you're thinking of adding Oscars to your planted tank, keep these important facts in mind.

Which is the Best Choice: Canister Vs Hang-On Filters?

One of the most important pieces of equipment you'll need for your aquarium is a filter. The canister or hang-on filter - which one is best for your needs?

Squirrelfish

Squirrelfish are a family of ray-finned saltwater fish. They are characterized by their large eyes and long, sharp dorsal spines.

Ebb and Grow: Growing and Controlling Algae in Your Aquarium

It doesn't take much for algae to become a problem in your fish tank. There are many reasons why it grows and there are a few ways to keep it under control.

Meet the Snail Assassin: Your Solution to Pest Snails

Got a snail problem you need taken care of? To take care of a snail problem, you need to send in an Assassin Snail, better known as Clea Helena!

Paradise Fish

Paradise fish are a colorful species of freshwater fish belonging to the gourami family. They were the first tropical fish to be imported 150 years ago.

Top 5 LED Aquarium Lighting Systems

Light up your tank with LED lighting. But which system do you choose? Here are our top five picks for LED aquarium lighting systems.

Fishy Secrets Revealed: The Pros’ Most Embarrassing Stories

We all have those forehead-slapping moments when we make a stupid mistake. Hey, not to worry - even the most seasoned of fish pros have made a few missteps.

Ray Fish

Rays are a large group of fish closely related to sharks. Ray fish are characterized by their flat bodies and a tough, elastic skeleton made of cartilage.

Hap Cichlids

Hap cichlids exhibit a wide variety of colorations and patterns ranging from solid blue to multicolored combinations of red, orange, and purple.

Unpopular Opinion: Goldfish Belong Outside

Some fish belong in tanks, others need to be outside. And even though you may not like it, the goldfish's place is in a pond.

Tips for Keeping Fiddler Crabs in Your Brackish Tank

Fiddler Crabs make a wonderful addition to a brackish tank. Easy to care for and fun to watch, here's what you need to know about the fiddler crab.

Best Aquarium Heaters for Tropical Fish

Just because you don't live in the tropics, it doesn't mean you can't have a tropical tank. Here are our picks for the best aquarium heaters for tropical fish.