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!

Best Cannister Filters for Large Aquariums

To ensure your fish are happy and healthy, water quality needs to be optimal. The best way to do that is with a high-quality canister filter.

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.�

Best Reef Aquarium Supplements

There are unique challenges to keeping a reef aquarium. To properly maintain this type of tank, you need the right reef aquarium supplements.�

6 Most Common Freshwater Fish Diseases

Just like any other pet, fish are susceptible to illness. If you have a tank, be on the lookout for these six common freshwater diseases.

Planted Tank Trend: Meet the Bucephelandra

Get on the Bucephelandra bandwagon. The latest trend in aquariums, Buce can turn your tank into colorful oasis and the centerpiece of your home.

Tetra 101: Introduction to Schools of Fish

It's time to go back to school - we're going to educate you on schools of fish. Before you head to the front of the class, we'll teach you about tetras.

Choosing the Right Substrate for Your Aquarium

Let's get to the bottom of aquarium substrate! Depending on what kind of tank you set up, you need to choose the right substrate for it.

Daily and Weekly Coral Reef Tank Maintenance Schedule

You've set up your coral reef tank and it looks spectacular. But don't rest on your laurels - daily and weekly maintenance to make sure it stays that way.

Aquarium Heating: Submersible Vs. Hang-on Heaters

Unless your aquarium only houses goldfish, you're going to need a tank heater. But should you go with a submersible or a hang-on heater?

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…

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.

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.

Best Natural-Looking Aquarium Decorations

When decorating your aquarium, you may want to create a look inspired by nature. We've picked out some of the best natural-looking aquarium decorations.

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.

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.

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.

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.

Planted Tank Basics: What Aquarium Plants Need to Thrive

Just like the ones growing in earth, there are certain basics aquarium plants need to survive and thrive. Let's go over the basics of planted tank care.

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.

Tips and Tricks for Stocking a Community Tank

You've decided to stock your own community tank. But what fish will get along together in your Zen aquarium? Here's what you need to know.

Best Aquarium Filters

Go with the flow and keep your tank sparkling clean. Choose from our list of the best aquarium filters to ensure your tank is properly maintained.

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.

Expand Your Saltwater Tank With a Refugium

Want tag on a new addition to your saltwater tank? With a refugium, you can add greater water capacity to your main tank for a host of benefits.

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.

Best Substrates for Saltwater Tanks

Make your saltwater tank look its glorious best. Decorate your aquarium with the best substrates for saltwater tanks and let it shine!�

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.

Best Aquarium Gravel for Freshwater Tanks

What's at the bottom of your aquarium? If you're looking for substrate, check out our picks for the best aquarium gravel for freshwater tanks.

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.

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.

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.

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!

4 Popular Cryptocoryne Species for Your Planted Tank

Lush and colorful, the Cryptocoryne species is a popular pick for planted tank enthusiasts. Why not add these vibrant aquatic plants to your tank?

Best Fish Food for Aquarium Fish

What do you plan to feed your fish? If you're just starting out with a tank, you'll want to choose the best fish food for aquarium fish.

Readers’ Picks: Top Seachem Products for Aquariums

Seachem is the most trusted name in the aquarium hobby game, according to PetGuide readers. Here we take a look at the top Seachem products on Amazon.

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.

Our Guide to the Best Nano Tanks

Short on space, but love fish? A nano tank may just fill that empty space in your home. Here are the best nano tanks we've found.

Keeping Carnivorous Plants in Your Home Aquarium

Don’t let the name scare you off. Adding carnivorous plants to your tank can take your aquarium to a new level of uniqueness. When you are ready to s…

Best Light Fixtures for a Planted Tank

Bring out the best in your vibrant aquarium with the right lights. Here's our guide to the best light fixtures for a planted tank.

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.

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.

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.

Why You Need To Dip Your Coral in Coral RX

You've spent a lot of time and money on your aquarium. Don't let nasty parasites take over - use Coral RX to drip your coral before adding it to your reef.

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.

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.

Don’t Clam Up: Open Your Tank to Clams

Clams could truly be the treasures of your saltwater aquarium. Available in a wide array of colors and sizes, clams can be the centerpiece of your tank.

Best Fish Food for Algae Eaters

Finding the perfect combination of aquarium inhabitants is an art. You want to find species that are compatible with each other in terms of size and color, but you also have to think about aggression and diet as well. Once you’ve established the ideal balance, it can be challenging to add a new inhabitant to the tank. If you’re struggling to control problem algae, however, adding a new species could be your best option. Bristlenose Plecostomus, oto cats, and other algae eaters are a natural and long-term solution for problem algae, but they require care of their own.

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