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!

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?

How to Safely Clean Your Tank and Aquarium Decorations

If you're sprucing up your tank with aquarium dcor, it's going to need to be cleaned. Here's how to do it without endangering your fishes' environment.

Ich or White Spot Disease: Causes, Symptoms and Treatment

One of the most common diseases affecting aquarium fish, Ich or White Spot Disease is highly contagious. More about the causes, symptoms and treatment.

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.

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.

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?

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.

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.

Top 5 Fast-Growing Aquarium Plants for Planted Tanks

If you're impatient for growth, you'll want aquarium plants that shoot up quickly. Take a look at these fast-growing aquarium plants for your planted 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.

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 Saltwater Aquarium Kit

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Exploring The Riparium: A New Kind of Planted Tank

Also known as a Riverbank Aquarium, the Riparium is growing in popularity. Let's go over the basics of this new planted tank trend.

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.

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.

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!

Best Aquarium Substrates for Planted Tanks

What's at the bottom of the best aquariums? The best substrates! Here's our list of the best aquarium substrates for planted tanks.

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.

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.

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.

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.

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?

Best Air Bubbler Aquarium Decorations

Turn your tank into a conversation piece with the right decorations. Here are our picks for the best air bubbler aquarium decorations.

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.

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.

Best Betta Tank Decorations

Do you want to complement your beautiful Betta fish? Why not fill your aquarium with the awe-inspiring Betta tank decorations?

Best Accessories for a Whimsical Fish Tank

Turn your tank into a wonderful, whimsical fish fantasy land! Here are the best accessories you should use for a whimsical fish tank.

How to Anchor Live Plants to Driftwood for a Natural Décor Scheme

Driftwood adds a distinct look to an aquarium. To make sure you pull off this style, follow our tips for properly using driftwood as a live plant anchor.

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.

Multiple Tank Syndrome: It’s Time for a Fish Addict Intervention

Speaking out on her addition to fish and aquariums, Summer Davis suffers from multiple tank syndrome (MTS), and she doesn't care who knows it.

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.

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.

Confessions of a Tank Addict: YouTube Fish Fanatic Rachel O’Leary

The first step is admitting you have a problem. The second step is to set up a YouTube channel and record your tank obsession - just like Rachel O'Leary!

Watts Going On With Your Aquarium Lighting?

Aquarium lighting is more than just watts per gallon. When you're setting up lighting for your tank, be sure to keep these important factors in mind.

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.

Can You Sustain a Planted Tank Without a Filter?

You don't have fish in your aquarium, just plants. That means you don't need a filter, right? Here's why you may want to add a filter to your planted tank.

How to Handle Stress in Aquarium Fish

It may seem like they're care-free, but aquarium fish can suffer from stress. Here's what you need to look for and what to do if it happens to your fish.

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.

What You Need to Know About C02 for Planted Tanks

Carbon Dioxide is an important element in your planted tank, and your plants need more than you think. Add extra C02 for a thriving aquarium.

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.

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?

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.

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.

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!

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.

How to Use Floating Plants in Your Planted Tank

Floating plants help to create a tranquil vibe in your aquarium. If you're new to this kind of plant, here are a few pointers 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.

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.

4 Annoying Pests Found in Your Freshwater Aquarium

Even the smallest pests can mess up the most pristine aquarium. Here are four common (and annoying) pests that could cause problems in your freshwater tank.