Fish Den Inc.

Fish Den Inc. has been a Denver institution for over three decades, and the loyalty of its customer base tells you everything you need to know. Walk through the door and you'll find a no-frills, old-school fish store packed floor to ceiling with tanks — freshwater up front, a dedicated saltwater section in the back where sharks cruise their enclosures, drawing kids and adults alike to stare.

It's not a showroom, but every tank is clean, well-maintained, and stocked with healthy, vibrant fish. The freshwater selection runs deep. Kuhli loaches, black ghost knife fish, a variety of catfish, cherry shrimp, and a rotating cast of tropicals fill the rows of tanks.

The live plant section is a genuine draw — multiple reviewers mention finding aquarium plants they couldn't source elsewhere in the Denver metro area. On the saltwater side, corals and marine fish round out the inventory, giving reef keepers a reason to make the trip. What keeps people coming back is the staff.

Michael, Dane, and the rest of the crew are consistently praised for taking time with customers, from helping a nervous beginner stock a 10-gallon tank to diagnosing a gravel-clogged filter on the spot and fixing it. The owner is hands-on and clearly passionate. Staff have walked customers through treating dropsy and fin rot, replaced broken pumps, and offered genuine care advice rather than just pushing a sale.

Pricing is competitive for Denver — fair on fish, and the equipment selection covers filters, food, medications, and essential dry goods. Some customers note you can find certain supplies cheaper online, but the in-person expertise and the ability to hand-pick healthy specimens keeps the value proposition strong. Parking is easy, the atmosphere is welcoming, and the fish consistently arrive home healthy and live long lives.

For aquarists across the Denver area, Fish Den remains a trusted destination that earns its reputation one tank at a time.