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Saltwater Fish
Explore saltwater fish care, feeding, tank setup, compatibility, and species guides to help keep marine aquariums healthy.


Visit Dallas North Aquarium: DFW's Local Fish Store
Dallas North Aquarium has served North Texas aquarium keepers for over 3 decades.
Located in Carrollton, the store carries freshwater fish, saltwater livestock, corals, plants, aquariums, equipment, food, and water-care products.
Some customers arrive with a detailed stocking plan. Others walk in holding a jar of cloudy tank water and hoping for answers. Both are welcome.

Nix
3 days ago3 min read


Mandarin Dragonet Care: The Reef Fish That Makes You Earn It
The Mandarin dragonet is one of the most recognizable fish in the saltwater aquarium hobby. Its maze of blue, green, and orange markings looks almost too elaborate to be real.
Unfortunately, good looks have gotten plenty of Mandarins into trouble. They are peaceful, stay fairly small, and appear easy to care for—but feeding one properly can be a serious challenge.
Before bringing one home, the aquarist needs more than a reef tank. They need a feeding plan.

Nix
Aug 145 min read


Powder Blue Tang Care Guide: Beautiful, Bold, and Not Here for Your Shortcuts
Few marine fish look as electric as the powder blue tang, and few punish shortcuts as quickly. This fish is active, bold, beautiful, and less forgiving than many beginner favorites. When its tank is too small, unstable, or crowded with the wrong fish, problems can show up fast.
A healthy Powder Blue Tang is one of the great showpiece fish in a reef tank. It cruises all day, picks at algae, flashes its bright blue body and yellow dorsal fin, and acts like it owns every inch

Nix
Aug 105 min read


Why a 75-Gallon Aquarium Is the Best All-Around Tank for Freshwater and Saltwater Hobbyists
Why a 75-Gallon Aquarium Is the Best All-Around Tank for Freshwater and Saltwater Hobbyists:
Ask a group of aquarium hobbyists what the "perfect" tank size is, and you're almost guaranteed to hear a different answer from everyone in the room.
Some enjoy the challenge of nano aquariums, while others believe that bigger is always better. But when it comes to finding a balance between stability, flexibility, cost, and long-term enjoyment, one size consistently stands out: the 75

Nix
Aug 64 min read


Professional Aquarium Maintenance: Enjoy the Tank, Skip the Scrubbing
An aquarium can completely change a room. Fish moving through the water, plants swaying in the current, and corals opening under the lights create the kind of atmosphere no framed “Live, Laugh, Love” sign has ever managed to achieve.
What people do not always see is the work happening behind the glass.
Aquariums are living systems. Water chemistry changes, algae appears, filters collect waste, equipment wears down, and fish occasionally make questionable life choices.

Nix
Aug 45 min read


Activated Carbon in Home Aquariums: What It Does and When to Use It
Activated carbon is one of the most familiar filter materials in the aquarium hobby. It appears inside disposable cartridges, media bags, canister filters, sumps, and chemical filtration reactors. It is often included with new aquarium filters, which can make it seem as essential as the filter itself.

Nix
Jul 279 min read


A Step-by-Step Guide to Safely Acclimating New Fish to Your Home Aquarium
Introducing new fish to a home aquarium is an exciting moment for any aquarist, but a careful and patient acclimation process is crucial for the health and survival of your new aquatic pets. Abrupt changes in water temperature and chemistry can cause significant stress, shock, and even death. This guide outlines the standard and most effective procedures for temperature acclimating your new fish.

Nix
Jul 234 min read

The Fish Files
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