About
Tucked into Firestone, Colorado, Biggslagoon has become a destination saltwater shop that draws reefers from as far as Denver — and they'll tell you the drive is worth every mile. This family-owned and operated store specializes almost exclusively in marine livestock, with a coral selection that reviewers describe as unlike anything they've seen in person. Wellso brain corals, duncan corals, rock flower anemones, and pieces customers say they've never even heard of before line immaculate tanks alongside clownfish pairs, chromis schools, tiger pistol shrimp, skunk cleaner shrimp, and tangs.
The show tanks alone are worth the visit — stunning reef displays that double as living proof of the team's expertise. Dale, Josh, Nick, and the rest of the Biggs family treat every customer interaction like a mentoring session. One newcomer described Dale spending over an hour explaining saltwater fundamentals without a hint of impatience.
Another returned after tearing down a failed setup years earlier, and the team helped them find a tank on marketplace, educated them for hours, and never pushed unnecessary purchases. Biggslagoon offers high-tech water testing that customers rely on weekly, and their live phytoplankton has earned a loyal following among coral growers seeing accelerated results. Their tank maintenance plans have literally saved tanks from being sold — one customer was ready to part with a marine setup after three years of downtime until Josh walked them through modern filtration options and ongoing service.
The store also ships coral, with reviews praising Josh's careful packaging and responsive communication from box to tank. The coral dipping service, consultation-first sales approach, and willingness to steer customers away from purchases that won't work for their setup build real trust. Tanks are spotless, prices are consistently praised as fair, and the atmosphere feels more like visiting friends who happen to have an incredible reef shop.
For saltwater hobbyists along Colorado's Front Range, Biggslagoon has built exactly the kind of community-driven store the hobby needs.
What they offer
Livestock, services, water
- Livestock & products
- Services
- Specializes in
Highlights
What makes them special
- Exceptional coral selection including rare pieces, Wellso brains, duncans, and rock flower anemones
- Family-run team (Dale, Josh, Nick) known for spending hours educating customers without pressure to buy
- High-tech water testing services customers rely on weekly
- Tank setup, maintenance plans, and livestock relocation services
- Ships coral nationwide with careful packaging and responsive communication
From keepers
Customer reviews
“These guys are certified pros. I came in just to look, and then Dale spent upwards of an hour just teaching me about how everything worked. I was totally new to salt water, but Dale broke it down so well and did not make me feel like I was annoying him or taking up his time. You could tell these people truly love these animals, and they will make sure youre set up to safely care for your new friends!”
— Pat Rick5.0a month ago“Biggs will always have my business because they build real community instead of just slinging fish and coral. Give them your business. You won't regret it”
— Chris Blaylock5.02 months ago“Some of the best and most knowledgeable people you'll ever meet. Incredible prices, amazing stock. Overall just an amazing place.”
— Randy Mills5.02 months ago“Awesome family-owned fish store! The perfect one-stop shop for anyone looking to take their salt water game to the next level.”
— ryan medina5.03 months ago“Very nice staff! Shop and tanks are spotless. Will return for any new livestock/equipment I need.”
— Dain S5.05 months ago“Biggs Fam always has the 🔥. Great people and a great shop”
— Zach Gerum5.05 months ago“Great people! Great service!”
— Gabriel Cordova5.07 months ago“Great selection of tropical Phish I grabbed a few..I'll be back..”
— J. Squires5.011 months ago“I stopped into this shop on a whim to look at potential supplies. Incredibly knowledgeable staff and superbly friendly team. 10/10 would recommend for all your saltwater supply needs!”
— Jeffrey Hock5.0a year ago“Beautiful coral and coral displays. Josh was super friendly and helpful. Great customer service.”
— Mike Berry5.0a year ago
Reference
Frequently asked questions
Note — Store information and services may change. Always call (720) 534-0800 to confirm current availability, hours, and services before visiting Biggslagoon.