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!

Tips for Converting From a Fish-Only to a Planted Tank

You've decided to make a change from a fish-only to a planted tank. When you're ready to add live plants to the mix, here are some tips you should follow.

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.

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.

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…

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.

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.

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.

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.

Best Artificial Aquarium Plants

Keeping a tank with live plants can be quite a challenge. If you want the look of a planted tank without the hassle, think about adding artificial aquarium plants.

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 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.

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.

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!

Pros and Cons of Feeding Your Fish Live Food

What are you feeding your fish for dinner? If you're planning on feeding your fish live food, here's what you need to know about this type of diet.

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.�

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.

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.

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.

Best Aquarium Testing Supplies

Depending on what kind of fish you're stocking your tank with, you're going to need to test the water to make sure it's just right. Here are the best aquarium testing supplies to help you out.�

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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?

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

6 Popular Aquarium Fish You Need To Avoid

Just because a fish is readily available, it doesn't mean you should keep it in your own aquarium. Here are six fish that shouldn't be in your tank.

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.

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.

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?

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.

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.

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 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.

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.

How to Tell If Aquarium Hobby Right for You

Keeping an aquarium is fun and rewarding - it also takes work. Do you have what it takes to dive into the aquarium hobby?

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.

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 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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