The Big Fish Aquarium Community Hub
Welcome to Big Fish Aquarium, where Chicago’s aquarium enthusiasts connect, learn, and share their love for aquatic life.
From freshwater favorites to reef showpieces, this is where the local fishkeeping community comes together — online and in store.
Live from Instagram
Join Our Growing Community
Follow @bigfish.chicago to see what’s new in the shop, discover local customer tanks, and get practical care tips from our team.
Want your aquarium featured?
Follow us on Instagram.
Tag your tank photos or reels with #BigFishChicago.
Tell us what you love most about your setup.
Each month, we spotlight a local hobbyist whose tank inspires others in the community.
Join the Conversation
Got a question about your tank setup, fish health, or coral care? The Big Fish Aquarium Forum is where local hobbyists connect to share advice, post photos, and learn from one another. Whether you’re new to aquariums or a seasoned reef keeper, this is your space to ask, learn, and grow with Chicago’s fishkeeping community.
behind the glass: our upcoming video series.
We’re launching a new video series that highlights real tanks, expert tips, and day-to-day life inside Chicago’s favorite aquarium store.
Subscribe to stay updated and get notified when new episodes go live.
Why People Love Shopping Local at Big Fish
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When you walk into Big Fish Aquarium, you’re greeted by real aquarists who live and breathe the hobby. We take time to understand your tank goals, livestock mix, and setup before making any recommendation. Whether you’re cycling your first tank or balancing a complex reef system, you’ll always get honest, step-by-step guidance — not a sales pitch. Every question is welcome here, and we’ll even help you troubleshoot on the spot. Check out our Aquarium Guides Hub.
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Whether you prefer to browse in person or shop from home, Big Fish Aquarium makes it easy to find exactly what you need. Our nationwide online aquarium supplies and live stock and Chicago location both feature a carefully curated mix of freshwater and saltwater fish, corals, plants, invertebrates, and aquarium supplies, all selected for quality and health.
We rotate livestock and dry goods weekly so there’s always something new to discover — from vibrant live plants and coral frags to premium foods, filters, and aquascaping tools. Everything we stock is chosen by aquarists who use it themselves, so you can shop confidently knowing your tank is getting the best.
Order online for convenient delivery, or stop by the shop to see our tanks and talk with our team in person.
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Big Fish Aquarium isn’t just a store — it’s a gathering place for Chicago’s fishkeeping community. You’ll often find customers swapping stories, sharing tips, and showing photos of their latest tank builds. We highlight customer setups in-store and online to celebrate creativity and help others learn from real experiences. Whether you’re new to the hobby or have kept tanks for decades, you’ll always feel like part of the family.
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We believe aquarium keeping should be relaxing, not overwhelming. Our team simplifies the process with clear maintenance routines, starter kits, and practical advice for building a healthy ecosystem that lasts. We focus on education and support so you can enjoy your aquarium with confidence — knowing your fish, corals, and plants are thriving. Think of us as your long-term partner in keeping things balanced, beautiful, and easy.
Join the big fish team.
Passionate about aquariums? We’re always looking for friendly, knowledgeable people to join our crew.
Whether you’re experienced in livestock care, aquascaping, or just eager to learn, Big Fish Aquarium is a place where you can grow — and help others enjoy the hobby too.