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!

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!

What Are the Most Attractive Corals for a Reef Tank?

Broccoli, bubbles and... open brains? These are just a few coral types that will bloom in your aquarium and give your reef environment life.

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.

Is It Safe to Keep Fish in a Small Bowl?

While fish bowls are often marketed as a simple, low-maintenance solution (especially for beginners), they fall short in several critical ways when it comes to keeping fish healthy and happy. Let’s explore why.

Best Aquarium Supplies for Biological Filtration

Balance is the key to a healthy aquarium and filtration plays a major role. That's why you need know about the best aquarium supplies for biological filtration.

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.

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.

Oscars and Aquarium Plants: Can You Have Both?

Some fish and aquarium plants don't go together. If you're thinking of adding Oscars to your planted tank, keep these important facts in mind.

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.

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.

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?

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.

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.

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.

Join the Club: The Eastern Betta Society

Want to join like-minded fish enthusiasts near you? The Eastern Betta Society in an online community where you can log in and talk betta!

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!

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.

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?

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.

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 Kits for Beginners

You want to get an aquarium, but you don't know where to start. Not to worry - we've compiled a list of the best aquarium kits for beginners.

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 Betta Tank Decorations

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

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.

Buying Guide: Best Betta Fish Tanks

Betta fish tanks are designed to provide optimal comfort to a fish of their size and make sure your vibrantly colored pet thrives in its new environment.

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.

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.

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.

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.

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.

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.

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.

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.

Can Betta Fish Live with Other Fish?

Betta fish - also known as Siamese fighting fish - are some of the most striking freshwater fish you can add to an aquarium. But can they mix with other fish in the 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?

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.

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!

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.

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.

What’s Wrong With My Aquarium Plants?

Your aquarium plants aren't thriving; in fact, it looks like they're going to go belly up! Here are some common problems you'll see with aquarium plants.

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.

Heating Things Up With Eheim Jager Heaters

Not too cold, not too hot... you want to keep the temperature just right. Buying the right heater sets the right climate for the health of your fish.

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.

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.

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.

How Often Should I Feed My Fish?

There are a lot of factors that will determine the feeding schedule you have for the inhabitants of your saltwater or freshwater aquarium. The frequency of feeding your fish depends on the type of fish, their age, and the specific conditions of your tank.

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