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!

Pet-Sitter Loses Fight for $1M in Damages After Bad Yelp Review

Great news for honest reviews. A Texas pet-sitting company's $1 million lawsuit against clients who gave it a 1-star Yelp review has been thrown out.

The Pros and Cons of CO2 in an Aquarium

CO2 in your aquarium can take your plants from average to extraordinary. But before adding extra to your tank, make sure you know its pros and cons.

Best Aquarium Filter Media

There are parts of your aquarium that work behind the scenes to ensure that it works properly. Here's how to choose the best aquarium filter media for your tank.�

What Plants Can I Pair With Plant-Eating Fish?

Your planted tank sure looks good... good enough to eat! Here's what you need to know if you don't want fish eating all of the plants in your aquarium.

6 Popular Aquarium Fish You Need To Avoid

Just because a fish is readily available, it doesn't mean you should keep it in your own aquarium. Here are six fish that shouldn't be in your tank.

The Best Aquarium Sand

What are you decorating the bottom of your tank with? We've got some ideas - here's the best aquarium sand on the market.

Add Color to Your Tank With Freshwater Shrimp

Have you ever thought of adding freshwater shrimp to your aquarium? A wonderful addition to any tank, shrimp brighten and bring zest to a tank.

Mail Call: The Ins and Outs of Shipping and Receiving Fish

If you can't go to the fish, perhaps the fish can come to you. Here are the essentials of shipping and receiving fish through the mail.

5 Plants Picks for Your Brackish Aquarium

It's not saltwater, it's not freshwater - brackish aquariums offer a bit of both! But finding the right plants for this type of tank can prove to be tricky.

Our Guide to the Best Aquarium Sea Salt

Are you interested in setting up a salt water tank? Then you'll need our guide to the best aquarium sea salt.�

Feeding Techniques for Your Coral Reef Tank

With a coral reef tank, you need to think about the eating habits of all the inhabitants. Here are some tips to ensure they all get their fair share.

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.

Go Green With the Emerald Crab

Crabs are a cool addition to an aquarium. And the Emerald Crab does more than add color - these invertebrates clean up after themselves.

Saltwater Shopping List For Beginners

Starting up a saltwater tank is a lot simpler when you have a must-have list of items. Use this list as a start point for your new saltwater aquarium.

Fish RX: Hikari PraziPro Fights Parasite Infestations

What do you do when your fish get sick? Before or after parasites invade your aquarium, medicate your fish with Hikari PraziPro.

What You Need to Know About Feeding Your Fish

A healthy fish aquarium starts with the right nutrition. There are many types of fish food on the market – which one should you choose? When it comes t…

Setting a Schedule for Routine Tank Maintenance

Aquariums need to be maintained regularly - it's essential to keeping your fish healthy and your tank looking its best.

Best Aquarium Hoods

Don't just think about the design of your tank - you also have to remember the practical elements. With that in mind, here are our picks for the best aquarium hoods.

10 Essentials You Always Need in Your Fish Room

Wonder what the pros keep in their fish rooms? They've shared their tips with us, and we're passing along the 10 essentials you need in your fish room.

Aquarium Snails: The Good, The Bad, And The Ugly

What starts out as a small nuisance may end up becoming a "Snail Apocalypse!" Here's how these visitors get into your aquarium and what you can do about it.

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.

How to Use Aquatic Mosses in Your Planted Tank

To make your tank truly spectacular, try adding moss to the mix. With many types to choose from, moss adds a lush and natural touch to your aquarium.

Best Artificial Aquarium Plants

Keeping a tank with live plants can be quite a challenge. If you want the look of a planted tank without the hassle, think about adding artificial aquarium plants.

Paludariums Have Room For More Than Just Fish

Who says an aquarium is just for fish? A paludarium can house a host of animals and plants that takes on the feel of your very own exotic wetland!

Stay Tuned For Aquarium’s Got Talent

What amazing talent lurks in your tank? Take a front row seat - you won't believe the specular show that's going on in your aquarium!

Top 3 Marine Invertebrates for Beginners

You're getting creative with your tank, and you're thinking about adding invertebrates to the mix. If you're a beginner, start with these marine inverts.

Cute But Deadly: The Truth About Fish Bowls

They may be compact and stylish, but there's nothing cute about fish bowls. Small space and toxic water conditions are just a few of things wrong with them.

Product Review: Hydor Professional External Canister Filter

Essential for a healthy aquarium, the right filter keeps water quality in your tank high. Is the Hydor Professional External Canister Filter up for the job?

Readers’ Picks: Top 12 Live Amano Shrimp Buys

Who knew that Amazon was a great place to buy live shrimp? From start to drop off, happy customers are reporting no casualties en route.

What You Need to Know About the Nitrogen Cycle

The Nitrogen Cycle is important if you're interested in cultivating a thriving aquarium. Let's talk about the basics and why you need to know about it.

Aquarium Biology 101: Anatomy of a Fish

We all know that a fish has gills and fins... but there's more to them than just a few basic parts. Get ready for our crash course in "Anatomy of a Fish."

Best Affordable Supplies for a 20-Gallon Tank

Thinking about getting a home aquarium? You need more than a tank! Here's our list of best affordable supplies for a 20-gallon tank.

Why I Think Aquarium Rock Collecting Rocks!

Are you into hard rock? Not the music... the kind you put in your aquarium! Here's what you need to know before adding rocks to your tank.

Aquarium Basics: Let’s Talk About Amazon Sword Plants

When it comes to freshwater tanks, the Amazon Sword Plant is a fan favorite - for many reasons. Here are the basics you need to know about this tank staple.

Why You’ll Want to Add Mystery Snails to Your Aquarium

Mystery snails are a welcome addition to an aquarium. Colorful and community oriented, these crustaceans will clean up after themselves and tank mates.

Growing and Propagating Your Own Coral

Feel like fragging? If you want to propagate your own coral, you sure do! This cost-effective practice lets you grow your own coral.

Best Aquarium Kits Under 10 Gallons

Setting up a home aquarium can be a lot of fun, but it can also be challenging. You’re not just creating a visual element to add to your home décor – you’re actually creating a captive aquatic environment that needs to support life. If you’re not quite sure where to start as a budding aquarium enthusiast, you might consider easing yourself into the hobby by purchasing a small aquarium kit to start.

Get to Know the Bristlenose Pleco

A lesser known variety of the species, the Bristlenose Pleco has a lot going for it. Easy to care for, this fish makes a great addition to home aquariums.

The 5 Stimulating Spawning Methods of Fish

The spawning habits of aquarium fish are fascinating. When it comes to reproducing, fish fall into one of these five spawning types.

Betta Leaf Hammock is the Perfect Fit for Any Tank

Researchers suggest keeping bettas happy by housing them in large, landscaped tanks. This hammock is a great addition to any enclosure.

What Are the Most Difficult Aquatic Plants to Grow?

Some plants take a lot more work than others. If you're looking for a challenge, these are the most difficult aquatic plants to grow.

How To Speak Fish: More Than Just Blowing Bubbles

You may not hear it, but your fish have a way of talking to each other. Even though they don't make a sound, their actions speak louder than words!

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.

Cichlids: One Of The World’s Most Fascinating Freshwater Fish Specie

Colorful and plentiful, cichlids are a popular freshwater aquarium fish. If you're looking to add them to your tank, here are a few basics to keep in mind.

4 Most Common Mistakes New Aquarium Hobbyists Make

Hey, we all make mistakes. And when it comes to aquariums, there are a few common ones that new hobbyists are bound to make.

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.

Top 5 Low Light Corals for a Beginner Reef Tank

You want to start a coral reef tank, but you're not sure where to start. Here are five types of coral that are great for beginners.

Conditioning Your Fish Tank With Seachem Prime

To remove chlorine from tap water so that it's safe for your aquarium, you'll need a prime water conditioner. And Seachem Prime is what the pros recommend.

Best Automatic Aquarium Feeders

We've put together some tips for choosing and using an automatic aquarium feeder and our top 10 picks for the best automatic aquarium feeders.

Best Aquarium Filters for a Beginner Tank

An aquarium filter is an important part of your tank's water quality. Choosing the right one for your first tank is vital - here's our list of the best aquarium filters for a beginner tank.

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.

Risky Business: Four Types of Dangerous Aquarium Fish

Swimming in the shallow end isn't for everyone. Some people like their fish to have a bit of bite! Check out these four types of dangerous aquarium fish.

What Causes PH Changes and How to Fix Them

What's the chemistry like between your aquarium fish and the water they swim in? Keeping the pH of your tank water is a vital element to healthy fish.

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!

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.

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.

Best Color-Enhancing Fish Food

The most focal part of your tank is your fish, so you want them looking their best. Keep them vibrant with the best color-enhancing fish food.

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.

Top 5 Live Plants to Use in Brackish Aquariums

A mix of salt and freshwater, brackish aquariums present its own set of challenges. Here are a few plants that hold up in this type of tank.

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?