Welcome to Underwater Phantaseas. We are your one-stop-shop for all things SCUBA! With more than 35 years as a PADI facility, we offer everything from training classes, to equipment and dive travel.


We have the highest rating given to a PADI training facility. In order to attain this rating we must meet and maintain strict guidelines and controls set down by PADI - the largest and most recognized certification agency in the world. 
Our heated, indoor pool allows us to take as much time as needed to work on your diving skills without rushing through the course due to time constraints. The pool is maintained at a very warm temperature for your enjoyment and comfort.
We have a complete selection of both diving and snorkeling equipment which our staff or your instructor will help you with. We give our students a 10% discount on all gear in the store, except for course materials and items already on sale. We also have an onsite, certified technician to help you maintain your equipment when it's time for annual servicing of regulators, bcds and computers! 
Planning a trip? Come and talk to us before you leave. We'll give you helpful, free advice on places to stay, who to dive with, and things to do at your resort destination. We also escort many dive trips each year to a variety of exciting destinations throughout the world. Please ask us for a list of dates and details.

A note from the owner... 

Underwater Phantaseas originally opened in 1982 as ‘The Scuba Shop’ by Maureen May & Jerry Tassett. It became Underwater Phantaseas in 1992, when Jamie Tuckwell and Dave Loggins purchased it and re-christened it.

The Scuba Shop was originally across the street from its current location at 160 S Union Blvd. In 1987 Maureen and Jerry built the unique structure that now houses Underwater Phantaseas. With teaching scuba in mind, they started with a pool in the basement, and built up! Underwater Phantaseas was one of the first scuba shops in Colorado to house its own pool. This makes scuba training much more convenient and comfortable (pool is heated to 89 degrees), for all our students.

I came to work for Jamie in 1992. I recently celebrated 25 years with Underwater Phantaseas. I started out as a part-time sales person and scuba instructor. Eventually I came to manage the store for Jamie. When Jamie retired in 2005, I bought the business from him. It has truly been a family business for me. My wife, Jill, took classes here and became an instructor as well. All three of our children have been certified through the shop and have traveled to some great dive destinations.

I like to think it is not only a family business, but also a place where families can get involved in a fun, adventurous activity, that they can share together. My kids and many others over the years became certified to dive at just ten years old.

Underwater Phantaseas offers great adventures for everyone. Not only do we teach beginner PADI Open Water Scuba courses, but we also teach a host of other courses to keep you involved in scuba between your trips. You can even become a PADI Instructor with us!

Whatever your scuba needs may be, we can take care of them. We service and sell top of the line, name brand scuba equipment. We have lots of different courses from 2 hour snorkel courses, to instructor level. There is even a Discover Scuba birthday party, designed to introduce kids as young as eight years old to the sport! The thing that keeps my family and all of the staff here at Underwater Phantaseas excited about scuba, are the trips we run. Underwater Phantaseas takes group trips to all the best dive locations around the world to snorkel and scuba dive.

Please come see us and let us get you started on your next adventure!

Derek Prosser

Underwater Phantaseas