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!

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.

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 Aquarium Lights

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

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!

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.

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 Sponge Filters for Aquariums

Sponge filters provide mechanical filtration and, over time, may provide biological filtration as well.

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.

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.

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.

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!�

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.

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.

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.

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.

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?

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.

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 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.

4 Most Common Mistakes New Aquarium Hobbyists Make

Hey, we all make mistakes. And when it comes to aquariums, there are a few common ones that new hobbyists are bound to make.

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.

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.

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.

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.

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.

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.

How to Properly Acclimate New Fish in the Aquarium

When it comes to aquariums, how you add new fish to your tank is important to their safety and well being. Tips for acclimatizing fish to your aquarium.

Growing and Propagating Your Own Coral

Feel like fragging? If you want to propagate your own coral, you sure do! This cost-effective practice lets you grow your own coral.

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 Betta Tank Decorations

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

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.

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?

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.�

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.

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.

6 Easy Hacks to Cure Fish Boredom

Just like any other pet, fish can become bored, too. And while they won't chew up your shoes, keeping them occupied will ensure they live a healthier life.

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.

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.

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.

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 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.

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.

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.

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.

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.

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 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.

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.

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.

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.�

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.