Is Nitrate Good or Bad for Your Aquarium? If you search online for information about nitrate in fish tanks, many articles immediately pop up to warn you about the dangers of high nitrate and the best methods for lowering it. But how much nitrate is considered dangerous? And if nitrate is so toxic, why do many aquarium plant fertilizers increase nitrate levels when they are made to be safe for fish, shrimp, and snails? Let’s talk about one of the main points of confusion in the aquarium hobby — nitrate. What is Nitrate? When fish and ...

Everything You Need for a New Aquarium (from 5 to 75 Gallons) One of the most common questions we get at the Aquarium Co-Op retail store is, “What do I need to set up my new fish tank?” The answer is a bit complicated because the exact type of aquarium light, heater, or other accessory that we would recommend can vary greatly depending on the size of the aquarium and other requirements. To help simplify things, we have itemized the most common things we use when setting up a new fish tank, ranging from 5.5 to 75 gallons in volume. Before You Begin… As a...

Why You Need a Pre-Filter Sponge for Your Aquariums Looking for a very easy way to optimize your hang-on-back (HOB) or canister filter? Try a pre filter sponge (or intake sponge). This simple foam cylinder has a hole in the middle that allows you to slip it onto the intake tube of your filter, much like a sock. But why in the world do we need a prefilter sponge when we already have an aquarium filter? Intake sponges have a surprising number of benefits, such as: They provide more surface area to grow beneficial bacteria, which purify the wast...

Top 5 Aquarium Fish with Crazy Good Value for Beginners Contrary to popular belief, aquarium fish are not necessarily the cheapest animals at the pet store. By the time you buy the fish tank, heater, filter, and decorations, you may find that you have a limited budget for the actual fish themselves. The last thing you want to do is get a fragile animal that is difficult to care for or won’t last very long. To help you narrow down the huge selection of fish at the pet store, we’ve compiled our top 5 freshwater fish that are not only affordable but ...

Top 5 Underrated Aquarium Fish for Your Next Community Tank With so many aquarium fish available in the fish store, many species are commonly sold but end up going unnoticed by hobbyists. Sometimes they are looked down upon as “beginner fish” that aren’t as rare or unique enough. Other times, they may have once been all the rage but then fell out of favor for more newly discovered species. Most of these animals are pretty hardy and not hard to find, so take a look at our top 5 underappreciated fish that you should consider trying in your next aquarium...

Care Guide for Cardinal Tetras — Gorgeous Cousin of the Neon Tetra Most people have heard of the neon tetra — an extremely popular, little fish that displays a pair of blue and red horizontal stripes. However, many veteran fishkeepers often prefer its more colorful, higher-priced cousin, the cardinal tetra. Imagine watching an entire school of these colorful jewels swimming back and forth in the midst of a forest of lush, green plants. Find out what it takes to keep this gorgeous species and why they’re totally worth saving up for. Female cardinal tetra Wha...

How to Share 1 Air Pump with Multiple Aquariums As you may know, we are big proponents of using sponge filters in all of our aquariums, but what happens if you have multiple tanks running sponge filters? Is there any way to save money (and improve cable management) by only using one air pump to run all the filtration? It depends on how many tanks need air and how strong your air pump is, so here are some different configurations to try: 2 tanks next to each other can share a dual-outlet air pump. If you only have a single-outlet air pump,...

Care Guide for Amano Shrimp — Nature’s Amazing Algae Eater Algae can become a natural problem in any aquarium. If you have the wrong amount of light and nutrients, this unsightly issue can quickly take over in no time. While there are many methods for getting algae under control, having an algae eater in the tank is one of the easiest, safest, and most efficient approaches. The father of modern aquascaping, Takashi Amano, was fond of using an army of these little Japanese shrimp to keep his planted tanks nice and clean, which is why they are now know...

How to Breed and Raise Egg-Scattering Fish in Your Aquarium Breeding aquarium fish is a huge passion of ours, but the difficulty level can really vary depending on their method of reproduction. Some species are easy to procreate because the parents fiercely defend their offspring from would-be predators or the adults give birth to live young that can immediately flee. Other species like rainbowfish and killifish are willing to lay eggs in spawning mops, which are easy to remove and save from being eaten. However, one of the hardest types to breed are ...

Care Guide for Zebra and Leopard Danios – Energetic Little Speedsters Besides betta fish and guppies, one of the most popular beginner fish in the freshwater aquarium hobby is the zebra danio. They’re known for their eye-popping stripes, cheap cost, and adaptability to a wide range of water parameters. Plus, they are commonly used in science experiments (e.g., genetics, environmental studies, and medical research) because of their relative ease of breeding. Find out why this speedy schooling fish is so fun to keep and how to care for them in your home aquarium....

5 Amazing Wild Betta Species that You Should Try Breeding Everyone has heard of Betta splendens, the colorful, flowy-finned betta fish you see in pet stores. But did you know there are several other species in the Betta genus that can be kept in home aquariums? As with B. splendens, most of them come from the vegetation-filled swamps and marshes of tropical countries in Southeast Asia. Because of the low oxygen levels in stagnant waters, these anabantoids have a special labyrinth organ that allows them to swim up to the water surface to gulp air. Th...

Top 10 Rasboras for Your Next Community Aquarium Looking for the perfect schooling fish? Most people tend to think of tetras and danios, but don’t forget about the breathtaking world of rasboras. They look similar with their torpedo-shaped bodies and peaceful personalities, but most species are found in Southeast Asia and come in a wide array of unique colors and patterns. The common name “rasbora” actually refers to several genera of fish, including Rasbora, Boraras, Trigonostigma, Microdevario, and many more. Let’s talk about 10 different...

Top 5 Aquarium Fish That Love Soft Water Most beginners in the fishkeeping hobby are not aware that not all fish can live in their tap water. Some species are quite sensitive and will only thrive if the pH and GH (or general hardness) of the aquarium match their native habitats. Try measuring the pH and GH levels in your tap water using a multi-test strip. If you have a GH number that is 4 degrees (75 ppm) or lower, then your water contains fewer minerals (e.g., calcium and magnesium) than normal. Rather than fight your naturally so...

5 Quick and Easy Tricks to Improve Your Aquarium Filter There are a million and one ways to hack the filtration in your fish tank to optimize its efficiency, save money and time, and more. Some of these methods are just gimmicks, while others are pure gold that experienced veterans in the fishkeeping hobby have discovered over time. After owning hundreds of aquarium filters in our fish store and personal fish rooms, we’ve narrowed down our top 5 simple tips and tricks for getting the best performance out of your filtration. 1. Switch to Reusable F...

Care Guide for Pygmy Corydoras – The World’s Tiniest Cory Catfish Cory catfish are beloved in the freshwater aquarium hobby because of their happy-go-lucky nature and interesting behaviors, such as constantly shuffling through the substrate for snacks. While some hobbyists enjoy keeping the larger species, like the hognosed brochis (Corydoras multiradiatus) or emerald cory catfish (C. splendens), nano aquarium enthusiasts take special pleasure in finding the most petite corys. The pygmy cory (C. pygmaeus) has become quite popular because of its adorable app...

Where is the Best Place to Buy Live Aquarium Fish? Even though Aquarium Co-Op has a brick-and-mortar retail store that sells pet fish to the general public, we personally choose not to sell them online through our website and instead focus on shipping dry goods and live plants. Therefore, many people want to know where we recommend buying pet fish, especially if they don’t live near our fish store. Each source has its advantages and disadvantages, so in this article, let’s discuss the different options and which may be the right ones for you....