About Poseidon's Realm
Dallas-Fort Worth's dedicated source for marine and freshwater aquarium livestock, equipment, and professional tank services.
Who We Are
Poseidon's Realm was established in 2003 by aquarium enthusiasts with a simple goal: make it easier for hobbyists in the Dallas-Fort Worth area to build and maintain thriving aquatic environments. What started as a passion for saltwater fish and reef systems grew into a full-service aquarium business serving both hobbyists and commercial clients across the DFW metroplex for over two decades.
We carry hundreds of products spanning lighting, filtration, protein skimmers, additives, live foods, and more — along with a comprehensive online Fish Guide covering care requirements for over 120 saltwater species. Whether you're setting up your first nano tank or maintaining a dedicated SPS reef, we have the knowledge and products to support you.
What We Offer
- Saltwater fish, corals, and marine invertebrates
- Freshwater fish and pond livestock
- Aquarium equipment and supplies
- Lighting systems — LED, T5, metal halide
- Filtration, protein skimmers, and reactors
- Additives, test kits, and water conditioners
- Professional tank maintenance and installation
Service Area
We serve residential and commercial clients throughout the Dallas-Fort Worth metropolitan area, including Dallas, Fort Worth, Plano, Frisco, Allen, McKinney, Arlington, Irving, and surrounding communities.
Have a tank outside the DFW area? Call us — we can often accommodate or point you in the right direction.
Phone:
Our Approach
We believe a well-informed hobbyist has a better aquarium. That's why we built the Fish Guide — not just to sell fish, but to help you understand what each species needs before it arrives in your tank.
We recommend compatible livestock combinations, honest care difficulty ratings, and realistic expectations so your tank stays healthy long-term.
Professional Services
We offer a limited number of residential and commercial service accounts for ongoing aquarium and pond maintenance in the DFW area. Services include:
- Monthly and bi-weekly water changes
- Tank installation and setup
- Equipment maintenance and troubleshooting
- Aquarium consulting and design
- Pond maintenance and seasonal care