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Does My Aquarium Need RO/DI Water? How Does It Work?

Water being poured into an aquarium with guppy fish from a jug.

If you’re setting up your first aquarium, moving from fresh into saltwater, or thinking of keeping extra-sensitive fish, you may come across the term “RO/DI water” in your research. What is this stuff, and should you be using it? If so, how—and why? RO/DI water is a fantastic tool in the aquarist’s arsenal, and it’s … Read more

Types of Aquarium Filters & How To Choose One for Your Tank

Aquarium filter spray bar

Did you know that almost all types of aquariums require a filter in order to become a thriving mini ecosystem? Not only does the filter remove floating particles to make the water look nice and clean, but it also contains a large amount of the beneficial bacteria that make the all-important nitrogen cycle possible. A … Read more

The Nitrogen Cycle Explained (Beginner-Proof!) | Cycling an Aquarium

Aquarium with fish, coral, and blue background

Setting up your first aquarium? Congrats, you’re taking the first steps into an exciting hobby that gives you the unique opportunity of bringing a slice of underwater nature right into your living room. But don’t forget to cycle your tank before adding fish! If you’re not sure what “cycling” an aquarium means, it’s very important … Read more

Saltwater vs. Freshwater Aquarium | Which Should You Choose?

Temple decoration and moss ball in a freshwater aquarium

Thinking of setting up an aquarium in your home or office? Good choice! As mentioned in our post on the benefits of an aquarium, a fish tank makes for a fantastic centerpiece and learning opportunity. It even helps you feel more relaxed! But… between a saltwater vs. freshwater aquarium, which will work better for you? … Read more

Rummy Nose Tetra Care & Info | Your Water Quality Watchdogs

Rummy Nose Tetra close up in aquarium

There are many tetra species out there, one more spectacular than the other. One of our personal favorites, though, is the rummy nose tetra. This species’ red face and silver body ensure a dramatic display, while its friendly nature makes this little fish suitable for peaceful community aquariums. Find out everything you need to know … Read more

Types of Freshwater Pufferfish | FantaSEA’s 10 Favorites

Close-up photo of blue jelly shrimp with dwarf pufferfish

Thinking of adding a pufferfish to your freshwater aquarium? Good choice. Fish of the family Tetraodontidae, better known as the puffers, are among the most unique creatures you can keep in your tank! However, they also have some special requirements, and most don’t make the best choice for beginning aquarists. Which puffer matches your experience … Read more