The Most Innovative Hot Tub in Denver

Hot tub installation

What makes Bullfrog Spas so unique?

No other spa company builds a hot tub like Bullfrog Spas.  Their patented JetPak system is quite possibly the greatest innovation in hot tub history!  JetPaks are a system of modular seat backs with a variety of different massage configurations to choose from.  They are interchangeable and can be moved from seat to seat allowing you to customize the type of massage that you receive.  You can even fine tune the amount of pressure exactly to your liking.  JetPaks put you in control of your massage.  This level of flexibility cannot be found in any other hot tub on the market.

Bullfrog has built a better mousetrap.  This is a game changer!



What additional benefits do JetPaks provide?

The average hot tub contains 600 to 700 feet of plumbing.  A Bullfrog spa has less than 85.  Less plumbing means more jet power, better efficiency, and easier repair of your hot tub!

Every inch of plumbing and every pipe fitting or elbow is a source of friction as water travels from the pump to each jet, some of which are located on the opposite side of the hot tub.  This friction significantly reduces jet power and massage pressure.  Most hot tub manufacturers compensate for this inefficiency by using diverter valves and larger, less efficient motors

A diverter valve takes the jet pressure from one seat and diverts it to another.  Maximum pressure in any seat can only be achieved by robbing power from another area.  If a hot tub has a diverter valve you cannot run all of the jets at the same time with full power.  To further complicate things, the valves themselves are yet another source of power loss, reducing total jet pressure by up to 18%.  The additional plumbing required to install these valves reduces efficiency even more!

This basic design has been used by hot tub manufacturers for decades.  Now there is a better way.


JetPak technology allows you to have full power in every seat, with all of the jets turned on at once.  There are no diverter valves.  Each JetPak has an adjustment dial allowing you to fine tune the pressure to your liking.  You can achieve full power in any seat without having to take it from another.  Bullfrog spas let each person decide which massage they want, with total control over the intensity.  No other hot tub offers this level of therapy control.

By eliminating much of the plumbing (friction) Bullfrog is able to provide more powerful jets with smaller, more efficient motors

Bullfrog Spas

Bullfrog Spas 1

 Conventional Hot Tub……Spa-ghetti Monster?

Bullfrog Spas 2

JetPaks are exclusive to Bullfrog Spas and are protected by more than 12 different patents

Why is the ability to choose your own jet configurations such a big deal?

No two people are alike.  What provides relief to one person may not for another.  There are more than 20 different configurations to choose from.  Each one provides a different type of massage or targets a different area of the body.

While some may enjoy the steady pressure of the Neck Massuese JetPak, others will find relief in the soothing figure 8 massage provided by the Oscillator JetPak.   The powerful massage of the Deep Relief JetPak might be just right for one person, while another may prefer the more relaxing feel of the Rainshower JetPak.   No matter your preference, there is a JetPak for you.  Talk to any Bullfrog owner and with they will happily tell you which JetPak is their favorite.  Which JetPak will be yours?

The new Versa JetPak feels amazing!  It’s my favorite 🙂


JetPaks are all about personal therapy.  Bullfrog Spas consulted with Doctors, Chiropractors, and Massage Therapists in their quest to create the most therapeutic hot tub jets.  Mission success!  Bullfrog Spas have the most therapeutic jets available in a hot tub, hands down.

When you purchase a Bullfrog hot tub you get to choose the exact JetPaks that will work best for you.  You aren’t stuck with a generic, pre-determined configuration that may not address your needs.  Down the road, should your therapy needs change you can simply purchase a different, more appropriate JetPak.  As new designs become available, you can update your hot tub with the latest and greatest technology.  You can not do this with any other hot tub in the world!

A revolutionary design that makes other hot tubs seem obsolete.

The video below is a bit old but offers interesting insight into the development of Bullfrog Spas’ revolutionary design.  Some information has changed.

Bullfrog Spas Energy Efficiency hot tub image
click image above for larger view

Why are Bullfrog Spas more efficient than other hot tubs?Hot tub sealed base

  • Bullfrog’s powerful jets outperform hot tubs with conventional plumbing designs, yet accomplish this feat using smaller, more efficient motors.
  • Reducing the plumbing underneath creates more room for insulation.  Bullfrog spas are fully insulated.
  • Water stays in the main body of the hot tub rather than underneath in plumbing where it loses temperature at a much  faster rate.
  • Heat that builds up in the equipment compartment is recycled and returned to the hot tub water.
  • Bullfrog’s rigid ABS plastic bottom seals out moisture.  Insulation loses it’s ability to retain heat when wet.
  • Each Bullfrog spa meets or exceeds the stringent energy guidelines established by CEC Title 20.

Bullfrog Spas are manufactured in Salt Lake City, UT.  They are designed to operate efficiently in Rocky Mountain winters

Stil hot tubWhy are Bullfrog Spas less likely to leak?

In a conventional hot tub, every single jet requires a hole to be drilled in the shell reducing it’s strength and creating a potential leak point.  Additionally, each jet must be glued and attached to a water supply line.  This creates an additional leak point.  The process of plumbing a hot tub cannot be automated.  Factory workers must manually complete this entire process, introducing the potential for human error.  Many hot tub factories have been moved to Mexico to reduce the cost of such a labor intensive process.  Bullfrog Spas are proudly made in the USA.

Hot tub plumbing


In a Bullfrog Spa the shell is much stronger due to the reduced need for drilling.  There is only one hole per seat rather than one per jet.  The JetPaks and their fittings remain above, in the main body of water.  Should a jet fitting fail, it will leak back into the body of water rather than underneath.  The repair process is simplified.  A JetPak can be removed without the use of any tools.  There is no need to remove cabinet panels and dig around underneath.


Bullfrog Spas 3
Bullfrog Spas 4
Bullfrog Spas 5
  • The greatest variety of massage among all hot tubs
  • More power because there is less plumbing (and friction) per jet
  • The only hot tub you can customize before and after your purchase

Find out more

Precision Engineering and Superior Materials

The frame and structure of a hot tub are responsible for supporting thousands of pounds of water and the occupants of your hot tub.  Though almost every hot tub today comes with a synthetic wood exterior cabinet, the majority of hot tubs are constructed with sub-frames made of wood, often untreated.  Wood expands and contracts with changes in temperature and humidity.  Denver, Colorado regularly sees dramatic shifts in temperature, sometimes as much as 50 degrees, from day to day during certain times of year.  Wood frames and bases are also susceptible to damage from rodents, insects, and moisture.

Assembling a hot tub frame is very labor intensive.  To reduce high labor costs, many hot tub manufacturers have moved their production facilities to Mexico.  Wood must be manually cut, stapled, nailed, and glued.  Small gaps and minor issues in the finished product appear to be no big deal.  Months later, in the middle of a Colorado winter, little problems are magnified and the system is stressed. Small gaps become large gaps.  They continually expand and contract.  Cracks in a hot tub shell are typically caused by uneven support from the frame.  Most hot tub frames have no warranty whatsoever.

There is a better way


Bullfrog Spas are manufactured with state of the art technology and materials in Salt Lake City, Utah.  Your Bullfrog Spa from Colorado Custom Spas begins and ends it’s time in the Rocky Mountains.  Their injection molded frame and sealed ABS base pan are resistant to rust, rot, mold, or mildew and are backed by a lifetime warranty.  The sealed ABS base prevents moisture, rodents, and insects from entering the hot tub and wreaking havoc.  This system of manufacturing is consistent and eliminates the element of human error involved in cutting and fastening required to build a wood framed hot tub.  Each and every frame piece in a Bullfrog spa is injection molded.  This means that there is no variance ever.  Each piece is the exact same shape and size every single time.  It lines up with the base in exactly the same place, every single time.

Illustration of Bullfrog Spas UniSystem


Your Bullfrog Spa is built to last a lifetime.  When you also consider that they are infinitely upgradeable through JetPak technology, this is truly the last spa you will ever buy!


Enduraframe Nature


A Series

STIL Series

R Series

X Series