About
Underwater Wonders is a saltwater-focused aquarium store in Fort Collins, CO that has earned a near-devoted following among reef keepers across the Front Range — customers regularly make the drive up from Parker and beyond just to stand in front of the coral tanks. Owners Seth and Garrett built the shop on a service-first foundation, starting with tank maintenance and installation before opening for walk-in retail a couple of days a week. That history still shows in how they operate: they take unhurried time with every visitor, answering questions and, as more than one reviewer put it, happily geeking out over reef chemistry and coral husbandry with anyone who stops in.
The coral selection is the headline. " The frags are grown and propagated in-house, arriving multi-branched, fully encrusted, and vividly colored rather than fresh-cut, which hobbyists say translates to healthier, more resilient pieces in their home reefs. Strict quarantine means new buyers consistently report dipping their corals and finding them spotless.
Alongside the corals you'll find healthy saltwater fish and invertebrates for sale in Fort Collins, CO — one couple recently left with "the cutest little starfish" they had always wanted, and newer reefers say the fish and corals they brought home are thriving. Beyond livestock, the shop stocks reef equipment and supplies, including Apex gear, and runs a full service side: new tank setup, ongoing maintenance, relocation, and remote troubleshooting for traveling tank owners. Seth and Garrett also mentor a local high school biotechnology class studying the zooxanthellae in corals, donating equipment, livestock, and weekly time.
The tanks are immaculate, the prices fair, and the welcome genuine — for anyone keeping a reef in northern Colorado, this is the aquarium store worth the drive.
What they offer
Fish & livestock for sale at Underwater Wonders in Fort Collins, CO
Underwater Wonders stocks corals, reef fish, invertebrates, live rock and saltwater fish for sale in Fort Collins, CO. As an aquarium store serving Fort Collins, CO, it also carries aquarium equipment and offers tank maintenance, aquarium setup, aquarium consultations and fish quarantine.
- Livestock & products
- Services
- Specializes in
Highlights
What makes them special
- In-house aquacultured SPS and coral, called the best in Colorado and among the best in the country by reviewers
- Owners Seth and Garrett spend unhurried time teaching reef chemistry and coral husbandry to every visitor
- Strict quarantine protocols — buyers consistently report dipping new corals and finding them pest-free and spotless
- Healthy saltwater fish and invertebrates, including starfish, available to walk-in shoppers in Fort Collins
- Full service side: tank setup, maintenance, relocation, and remote Apex troubleshooting for traveling tank owners
From keepers
Customer reviews
“Very friendly and knowledgeable staff. Pricing is in line for the experience and getting livestock that are well taken care of. Will continue to go back”
— Justin Kirkpatrick5.06 days ago“I had an outstanding experience with Underwater Wonders and can’t recommend them highly enough. From start to finish, everything was handled professionally and efficiently. Seth was the one I worked with, and he truly made the experience exceptional. He was incredibly kind, easy to communicate with, and right on time—something that’s not always guaranteed these days. He took the time to answer my questions, explained everything clearly, and made sure the job was done right. It’s rare to find a company that combines great service with genuinely good people, but Underwater Wonders does exactly that. If you’re in the Fort Collins area and need their services, ask for Seth—you’ll be glad you did.”
— Bridger Jensen5.0a month ago“Underwater Wonders has been super helpful to us as we are new to the hobby. They strive to make sure you’ll be successful and enjoy your tank. The fish and corals we’ve gotten there are thriving and look great in our tank. Would highly recommend this store to anyone interested in a saltwater tank. Also a cool place to checkout to see their awesome fish and corals.”
— Daniel Held5.02 months ago“My boyfriend and I stopped by to check it out and ended up leaving with the cutest little starfish that we’ve always wanted! Owners were super kind and you can tell they genuinely care about what they do. 10/10!!”
— Robin Wilson5.03 months ago“Some of the best sps in the country! Love these guys :)”
— Blaise Wilt5.03 months ago“I just want to say I'm thoroughly impressed with not only the knowledge the owners gave us but I bought some gregorians”
— Aarron Macias5.04 months ago“Wonderful tanks and wonderful staff”
— Patrick Blackwell5.0a week ago“Underwater wonder Does a great job Their store is The best in Fort Collins, very healthy coral they have a great selection. They love their sticks, but they have a selection for everybody and they’re getting better at it and one of the owners Seth and his wife in his business partner. They’re all very good people.”
— Lucas Ham5.03 weeks ago“Before placing my order, I had an in-depth conversation with Seth regarding coral husbandry and the element program used in-store. His expertise gave me the confidence to move forward with Underwater Wonders. I recently received my first order and am incredibly impressed. The frags are multi-branched, well-encrusted, and vibrantly colored. Furthermore, after dipping the corals, I found them to be clean and entirely pest-free. Underwater Wonders has set a new standard for quality. I will certainly be ordering again and highly recommend them to anyone; once you experience their quality, you won't want to shop anywhere else.”
— Nick Porter5.03 weeks ago“I just received my first order from UW and couldn't have been more impressed. Communication was great. Packaging was extremely well protected - including shipping the corals in more water than most shippers nowadays. Every frag I received would be at least considered an XL frag (multi-branch) from any other vendor (and priced to match), and one was a full blown mini-colony. Their prices are very competitive - and you get twice the coral for the money. The frags were all fully encrusted (not fresh cut) and very healthy - which significantly increases survivability. I always dip new coral, and these were spotless. UW should be viewed in the same tier as WWC and TSA.”
— Jason Hendricks5.0a month ago
Reference
Frequently asked questions
Note — Store information and services may change. Always call (970) 592-9009 to confirm current availability, hours, and services before visiting Underwater Wonders.