Care Guide for Amazon Puffers – Freshwater Puffer for Community Tanks Puffers are fascinating fish in the aquarium hobby because of their unusual, globelike shape and intelligent personalities, but many species grow incredibly large, require brackish water, or are too aggressive to be kept with other tankmates. Fortunately, the Amazon puffer is one of the few freshwater “community puffers” that only grows to 3 inches (7.6 cm) long and can live with other fish. Find out how to care for this amazing oddball and see if it’s the right pufferfish for you. What is th...

10 Smart Ways to Use an Aquarium Catch Cup or Specimen Container Have you ever seen those clear rectangle boxes hanging on the outside of tanks at your local fish store? You are looking at one of the most versatile tools in the fish keeping hobby – the aquarium specimen container or catch cup. It acts like a small, transparent bucket for observing fish, holding aquarium supplies, and a million other uses. Learn about the top 10 ways we find ourselves using catch cups every day at our retail fish store and personal fish tanks. 1. Observation It can be hard ...

Our 5 Favorite Aquarium Plants That Everyone Should Try If you have ever tried to buy live aquatic plants online, it can be a bit overwhelming when looking at all the different species, care requirements, and difficulty levels. At Aquarium Co-Op, we strive to provide a curated selection of the easiest, hardiest plants in the hobby, but sometimes it can be nice to just talk to someone at the store and get a few personal recommendations. That’s why we interviewed our CEO Cory McElroy to find out what his current favorite plants are that he thinks ev...

How to Catch Aquarium Fish Like a Pro One of the more frustrating parts of the aquarium hobby is trying to catch or move your fish. Just try chasing around fast and slippery fish using a flimsy net with a ton of aquarium decorations in the way. After years of running an aquarium fish store, we have caught thousands and thousands of fish, so we know a thing or two about trying to wrangle the exact number, type, or color of fish for our customers. Learn about our favorite technique for netting fish that not only saves time but also...

Care Guide for Endler’s Livebearers – The Guppy’s Little Cousin Livebearers (or fish that bear live young) like guppies and mollies are always popular fish at pet stores because they’re so colorful and quick to make babies. However, lots of inbreeding has been occurred in order to create specialty colors and that can sometimes result in weaker strains that are not as hardy or long-lived. Therefore, we often recommend Endler’s livebearers as an energetic and entertaining nano fish that is easier for beginners to keep. What is an Endler’s Livebearer? Poecil...

Are Indian Almond Leaves Good for Aquarium Fish? Have you ever seen a stack of large, dried leaves at the fish store and wondered what they are for? Indian almond leaves (IAL) or catappa leaves come from Terminalia catappa, a tree that originates from Asia and Oceania but now grows in tropical and subtropical regions all over the world. Its fruit seeds taste similar to almonds, and its leaves are commonly used in herbal teas and traditional medicines. Fruit and leaves of the Indian almond tree When you drop a dried catappa leaf into your a...

Care Guide for White Cloud Mountain Minnows – Underrated Beginner Fish When beginners start their first aquarium, many of them choose popular fish like fancy guppies and neon tetras that can sometimes come with unexpected health issues. If you come to our retail store, we might steer you towards one of our favorite beginner fish – the white cloud mountain minnow (WCMM). The “poor man’s neon tetra” is one of our best-selling species because they are so easy to care for, always lively, and capable of breeding without a lot of work. In fact, our CEO Cory McElroy us...

How to Customize Your Aquarium Filter with Filter Media Aquariums can widely differ in their size and stocking levels, so it makes sense that people want the ability to customize the filtration to best suit their needs. Most filters – such as hang-on-back (HOB), corner box, internal, canister, and sump filters – can be modified by changing the types of filter media used inside. Filter media refers to the different layers of materials that tank water gets filtered through before returning to the aquarium. Keep reading to learn about the different k...

How to Feed Frozen Fish Food to Your Aquarium Feeding only fish flakes or wafers to your aquarium fish is like the human equivalent of only eating protein bars every day. Yes, they contain a well-balanced mixture of nutritious ingredients, but wouldn’t it be nice to treat your fish to a sumptuous roast chicken dinner every once in a while? Then you should try frozen fish foods. This premium-grade fish food is packed with high-quality proteins, healthy fatty acids, and gut-loaded vitamins. After live foods, frozen foods are the next close...

10 Best Loaches You Have to Try If you’re looking to add a lot of fun and excitement to the bottom third of your fish tank, loaches might be the perfect fit for you. It’s hard to describe this very diverse group of freshwater bottom dwellers, but many of them have a long-bodied shape, scaleless appearance, and whisker-like barbels on their faces. Find out which ones we love the most and how to best care for them. 1. Clown Loach (Chromobotia macracanthus) These gorgeous loaches are popular in the aquarium hobby because of...

How to Care for Water Wisteria (Hygrophila difformis) Water wisteria (Hygrophila difformis) is a very popular aquarium plant in the hobby because of its lacy leaves, bright green color, and rapid growth. While its care requirements are easy, this species is very prone to melting and losing its leaves when you first purchase it (similar to melting Cryptocoryne plants). Find out our best tips and tricks for planting your new wisteria, getting past the melting phase, and propagating it to grow new plants. What is Water Wisteria? This aquatic stem p...

Top 5 Oddball Fish for a 10-Gallon Aquarium If you’ve been in the aquarium hobby for a while, you have probably owned a majority of the most popular fish sold at pet store chains. Keeping oddball species is a great next step for advancing your fish keeping knowledge. Oddball fish tend to have unusual appearances, can be harder to find, and may come with complicated care requirements. If you are up for the challenge but have limited space, check out our 5 favorite oddball fish that can be kept in a 10-gallon aquarium. 1. Shell Dwellers ...

5 Best Aquarium Plants for High Tech Planted Tanks with CO2 Have you ever heard the words “low tech” and “high tech” being used when referring to a planted aquarium and wondered what the difference was? To put it simply, the more energy that goes into an aquarium setup, the “higher tech” it is. A high tech planted tank may use intensely bright lighting, a pressurized carbon dioxide (CO2) gas system, and large amounts of fertilizer. Because a lot of energy is going into the system, high tech setups are often very costly and need more maintenance than a...

Care Guide for Hillstream Loaches – The Oddball Algae Eater Reticulated hillstream loaches (Sewellia lineolata) are one of the coolest-looking algae eaters, but there’s a lot of conflicting information about their care requirements that makes people hesitant to try them. After more than a decade of owning, selling, and breeding them, this article shares our personal experiences on how to successfully keep this amazing species. What are Reticulated Hillstream Loaches? There are many types of hillstream loaches that live in similar environments, but let...

Care Guide for Clown Killifish – Colorful, Top-Dwelling Nano Fish Looking for a colorful, little fish that stays in the upper third of your nano aquarium? Say hello to Epiplatys annulatus, also known as the clown killi, rocket killifish, and banded panchax. These common names come from the alternating vertical bands of dark brown and tannish-yellow on its body and the vibrant, flame-like tail that males possess. While adult killies can reach up to 1.4 inches (3.5 cm), most of the fish sold at stores are juveniles around 0.5 inch long and won’t display their...

How to Care for Aquarium Fish While on Vacation When going out of town, it can be stressful trying to arrange care for your pets. Thankfully, aquarium fish are generally on the easier side of care requirements because you don’t need to walk them, let them out to use the restroom, or even feed them every day. Here are four methods we recommend for ensuring your fish stay happy and healthy while you’re away. Before You Leave… Give your fish tank a good cleaning a couple of days before your departure. Do a partial water change, vacuum the sub...