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!

How to Safely Clean Your Tank and Aquarium Decorations

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

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…

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…

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.

Putting Your Best Fin Forward at Aquarium Fish Shows

Have you ever been to a fish show? All aquarium hobbyists will want to attend one of these events to see the brightest and best fish strut their stuff!

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.

Readers’ Picks: The Best Fish Products on Amazon, According to You

This list isn't at all fishy. We went through the most popular fish-related items bought by our readers on Amazon last year to bring you this rundown.

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.

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.

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.

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.

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?

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?

4 Best Types of Lighting Systems for Planted Aquariums

Got light? The right lights on your aquarium can not only make your tank shine, but it's also necessary component for plants to thrive.

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.

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.

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.

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.

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 Power Filters

When you're stocking your aquarium, don't forget about the right filtration for your tank. Here are our picks for the best aquarium power filters.

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 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.�

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.

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 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.

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?

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 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.

The Best Aquarium Thermometers

Keeping your tank water at the perfect temperature is extremely important. That's why you need the best aquarium thermometer for your tank.

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.

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.

Tips for Keeping Your Aquarium Water Quality High

You may not be able to see it, but the quality of the water in your aquarium makes all the difference. Here's why your water quality needs to be high.

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.

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.

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!

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.

The Bobbit Worm: Your Saltwater Tank’s Loch Ness Monster

Just when you thought it was safe to go back into your tank, your saltwater fish start disappearing! A devious worm may be at the center of this mystery.

Best Aquarium Pumps

Pump it up! To improve the lives of your fish, you need to invest in the right equipment. Here are our top picks for the best aquarium pumps.

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.

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.�

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!

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.

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.

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.

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.

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.

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…

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.

The Lowdown on Fish Laws

Are you guilty of breaking a fish law? Perhaps you don't even realize that what you've done is illegal. What you don't know may land you in hot water.

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?

Fish Ponds Let You Take Your Hobby Outside

Revitalize your outdoor living space with a container pond or a small water feature. Easy and inexpensive, your pond will add new life your landscape.

5 Common Mistakes Made by Reef Keepers

When you're starting out, the smartest thing to do is learn from others' mistakes. Minimize your reef keeping boo-boos and take some advice from the pros.

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.

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.

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.

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.

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.

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 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.