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!

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.

Daddy Dearest: A Look at Fish Fathers

Being a dad isn't easy - even when you're a fish! Fish fathers have an important role to fill when it comes to reproduction and caring for their offspring.

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.

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.

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!

Freshwater Clams: An Underutilized Invertebrate

Does your aquarium have a couple of clams? You need to add a few to your tank – these invertebrates are for more than just show. When you think about c…

Top 8 All-In-One Aquariums

You want a fish tank, but you want everything you need in one package so you've got the essentials. Here's our list of top 5 all-in-one aquariums.

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.

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.

The Best Aquarium Gravel Cleaners

You may not think much about it, but the gravel at the bottom of your tank needs certain care. Here are our picks for the best aquarium gravel cleaners.

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.

Colorful Tips for Starting a Nano Reef Tank

Amazing things come in smaller packages. If you live in a smaller space and you're a coral enthusiast, set up a nano reef tank.

Top 3 Most Popular Types of Aquarium Filters

You know that you need a filter to keep your aquarium clean. Did you know that certain types of tanks need a filter that'll get the job done right?

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.

Taking a Closer Look at Oscars

One of the most popular aquarium fish species is the Oscar. Brilliantly colored and quite smart, there's a lot you didn't know about these tough fish.

Cost-Cutting Tips and Tricks for Aquarium Enthusiasts

We all love tips and tricks that'll save us money. That's why we put together a few tricks for spending less cash when it comes to your fish aquarium.

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.

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?

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.

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.

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.

Get to Work on an Office Aquarium

Bring life into your office with a fish tank. A growing trend in the workplace, aquariums add color, energy, and stress release to a busy day.

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.

Radiant Reef: A Rainbow of Hard Coral

An underwater, eye-dazzling view! Available in all the colors of the rainbow, hard corals can turn your tank into a brilliant spectrum of wonder.

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.

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 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.

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.

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.

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.

Coral Reefing: Choosing Soft or Hard Coral

When it comes to making a choice between soft or hard, it's not just a question for tacos. For coal reefing, are you going to go with soft or hard coral?

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.

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.

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.

Aquarium LED Review: Finnex Planted+ 24/7

For perfect lighting, no matter what time of day, the Finnex Planted+ 24/7 LED fixture offers a hands-free simulated sunrise and sunset effect.

Top 5 Freshwater Fish Species for Planted Tanks

Now that you've got your planted tank set up, it's time to stock it with fish. You can't go wrong with these five freshwater fish species.

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 Aquarium Protein Skimmers

Keeping your aquarium water clean and clear is essential for the health and wellness of your tank inhabitants.�Here are our top picks for the best aquarium protein skimmers.

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.�

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.

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.

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.

Coral Reef-Safe Fish Species for Saltwater Tanks

Pairing the right fish with the right coral makes for a vibrant and healthy aquarium. Here's what saltwater fish will enjoy your coral reef tank.

Best Aquarium Lights

Lights� cameras� action! Put a spotlight on your tank with the right lighting. Here are our picks for the best aquarium lights.

Aquascaping: A Tank of Beauty

A tank can be a place to flex your artistic muscle. If you'd like to set up a stunning aquascape, you'll want to follow these tips to do it right.

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 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.

Go Green With EcoQube Air, the World’s First Desktop Greenhouse For

Kickstarter has the coolest products - look at the EcoQube Air. Grow a garden on your desktop and use your smartphone to control the greenhouse's settings!

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.

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…

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?

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.

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.

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!

The Dish on Discus

Aquariums with discus are visually stunning, but many have stayed away from this fish because of its complicated care. But it's easier than you think!

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?

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.

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.

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.

Top 3 Substrates to Use in Planted Aquariums

The key to the perfect planted tank is to get the balance between fish and plant needs just right. The solution is finding the ideal type of substrate.