How to Cure Fungus on Aquarium Fish If your fish has a white- or gray-colored growth on its mouth or body (often with a fluffy texture like cotton), it could have a fungal infection. Fungal outbreaks are often caused by stressful or poor water quality conditions and can rapidly lead to secondary diseases, so it’s important to address the problem immediately. In this article, we cover several options for treating fungus, as well as how to stop it from coming back. When you see any symptoms of illness, the first thing we always r...

Care Guide for Pea Puffers – The Smallest Pufferfish in the World Pea puffers are one of the coolest oddball species you can keep in a smaller-sized aquarium. They’re known for their helicopter-like maneuverability, independently moving eyes, and of course, ability to inflate like a tiny water balloon. In this practical care guide, we answer your most frequently asked questions about these amazing, little creatures. What Is a Pea Puffer? Carinotetraodon travancoricus – also known as the pea puffer, Indian dwarf puffer, Malabar puffer, and pygmy puffer – is ...

How to Culture Vinegar Eels for Fish Fry Are you getting into fish breeding but need a way to feed teeny-tiny fry that are too small to eat regular fry food? Try vinegar eels! This live food is very easy to culture and is perfect for raising babies until they’re big enough to eat baby brine shrimp. What Are Vinegar Eels? Vinegar eels are harmless, white roundworms or nematodes that feed on the microorganisms commonly found in vinegar and fermented liquids. Growing up to 50 microns in diameter and 1 to 2 mm in length, they are one of...

Quick Guide: How to Plant Live Aquarium Plants Congrats on getting your new aquarium plant! Depending on which type of plant you have, there are different guidelines you should follow for introducing your new foliage. This quick guide leads you step-by-step through the recommended ways for adding live plants to your aquarium. Should You Remove Pots from Aquarium Plants? Most plants purchased online or from a local fish store come in a plastic pot stuffed with rock wool. In most cases, you want to remove this little basket and the stuffing...

10 Best Coldwater Fish That Don’t Need a Heater Most freshwater pet fish require an aquarium heater because they’re used to tropical temperatures, but did you know there’s a whole class of coldwater fish that are perfectly fine at room temperature? Goldfish are the most well-known coldwater fish in the aquarium hobby, so in this article, we’re going to cover 10 more cool species that can live without a heater. 1. Sunset Variatus Platy We have a special place in our hearts for livebearers (or fish that bear live young) because of how readil...

Care Guide for Discus Fish – The King of the Aquarium Discus fish are one of the most beautiful freshwater fish in the hobby, known for their spectacular colors and large, circular shape. However, they’re notorious for being extremely difficult to keep, with Internet forums often recommending strict practices like 100% water changes every day. In reality, only a small percentage of people are able to follow those rules, and the rest of the world uses more low maintenance methods. We’ve spent many years keeping discus personally at home, caring f...

The Easy Guide to the Nitrogen Cycle for Aquariums Are you getting started with your first fish tank? Then you may have heard of something called the “aquarium nitrogen cycle,” followed by a bunch of complicated scientific terms and graphs that seem a little overwhelming. No need to panic! Keep reading as we explain the nitrogen cycle in this very short and simple guide. What is the Nitrogen Cycle for Aquariums? The nitrogen cycle basically describes how nature creates food (in the form of microorganisms and plants), fish eat the food and pro...

How to Use Pothos as a Natural Aquarium Filter One of the reasons we love aquarium plants so much is because of their ability to absorb toxic nitrogen compounds (produced by fish waste) from the water, but what if you own fish or aquatic pets that are natural-born plant killers? It’s time to get a pothos plant for your aquarium! While pothos won’t mechanically filter out particles from your tank water, they’re great at reducing nitrate levels (and algae growth) so that you don’t have to do as many water changes to keep your fish happy and...

Top 10 Easy Aquarium Plants for Beginners Planted aquariums are very popular nowadays because of their natural beauty and amazing ability to consume the toxic nitrogen compounds produced by fish waste. However, many beginners excitedly try and then fail to keep their green foliage from turning brown. After more than a decade of keeping, propagating, and now selling aquarium plants, we’ve thoroughly vetted out our list of top 10 easy aquarium plants that can stand up to a beating and won’t break the bank. 1. Marimo Moss Ball Known ...

How to Properly Clean Your Fish Tank When people find out you keep fish, they probably imagine a crusty, algae-coated tank where you can barely see anything swimming inside. But with just a few easy steps, you can keep your aquarium looking like a beautiful work of art. Follow along as we share our top tips for cleaning your fish tank like a pro. Before You Get Started… There are several frequently answered questions we often hear from beginners, so let’s address those first: How often do you need to clean a fish tank? Some peop...

Nutrient Deficiencies: Why Your Aquarium Plants Are Dying Do you have the perfect planted aquarium setup, but your plants are still dying one by one? It could be from a lack of nutrients. Even if you are regularly dosing fertilizers, your plants might still be missing key building blocks that prevent them from growing and thriving. In this article, we want to teach how to recognize the first signs of nutrient deficiencies so that you can take appropriate measures before your plants reach death’s door. Example of a normal, healthy plant leaf Types o...

Care Guide for Guppies – The Most Popular and Colorful Livebearer Guppies (Poecilia reticulata) are one of the most popular fish in the aquarium hobby because of their brilliant colors, lively personalities, and ease of breeding. In this care guide, we answer your most frequently asked questions about this simple yet beautiful species. Why Are Guppies So Popular? Discovered in South America around the 1860s, this hardy livebearer (or fish that gives birth to live young) was once used as pest control for mosquitos. They were eventually introduced to the pet ...

How to Use a Gravel Vacuum to Clean Aquariums Ever wonder if there’s an easy way to clean all the fish waste and uneaten food that’s fallen in between the aquarium’s gravel or substrate? The good news is that there’s no need to dump out and wash everything in the sink. Instead, you can vacuum up the detritus with a simple aquarium siphon – no batteries required! Step 1: Get the Materials You just need two items: an aquarium siphon (also known as a gravel vacuum, gravel cleaner, or siphon kit) and a bucket to hold the dirty water. If you ...

7 Popular Fish You Should Try in a 20-Gallon Aquarium 20-gallon aquariums are one of the most popular tank sizes among fish keepers because they’re small enough to keep in a bedroom but big enough that you can choose from a wide variety of fish to keep. With all these possibilities, check out our favorite freshwater fish to spice up your aquarium with their beautiful colors and interesting behaviors. 7. Julidochromis This stunning, three-inch fish is the perfect choice if you’ve ever wanted to try keeping Tanganyikan cichlids. They have the amaz...

5 Best Tank Mates for Betta Fish Betta fish are known to be fierce fighters, especially towards their own species, but did you know you can add tank mates to their aquarium? Yes, depending on your betta’s personality, he or she can peacefully cohabitate with other fish and invertebrates. However, make sure their aquarium is at least 10 to 20 gallons with lots of cover and live plants or else the betta fish may become overly territorial. Here’s our top 5 list of favorite tank mates for you and your betta fish to enjoy. 1. Kuh...

How to Fight 6 Types of Algae in Your Fish Tank Do you dream of having a beautiful aquarium but end up constantly fighting to keep algae at bay? It’s a familiar struggle that many of us have been through, so in this article, let’s get a better understanding of the root causes of algae, the most common types found in freshwater aquariums, and how to gain the upper hand. Is Algae Bad for a Fish Tank? Contrary to popular belief, algae are not evil. Like plants, they use photosynthesis to convert light and organic nutrients in the water (such ...