Bullfrog Simplicity™ Flat Filters for M Series (4 Pack)
Bullfrog Simplicity™ Flat Filters are the genuine replacement filters for Bullfrog's newest spas — and they represent a real rethink of how a spa filter is built. Instead of a pleated cartridge wrapped around a plastic core, the Simplicity filter is a flat, plastic-free panel that puts 100% of its surface to work. Sold here as a 4-pack, this is everything you need to keep a Simplicity-equipped spa filtering cleanly for months.
Your spa filter is the hardest-working component in your water care system. Every gallon passes through it again and again, trapping body oils, lotions, dead skin, pollen, dust, and the fine particulate that would otherwise cloud your water and clog your jets. A clean filter is what lets your sanitizer do its job instead of fighting a losing battle against debris — and a tired or clogged filter is the quiet cause behind a lot of cloudy-water and high-chemical-demand headaches.
The Simplicity design solves the two biggest annoyances of traditional filters. First, a conventional cylindrical cartridge wastes media: the round shape and rigid center core mean a lot of the filter isn't actually doing much filtering. The flat Simplicity panel uses its entire media area. Second, the Simplicity filter is built to be genuinely low-maintenance — rinse it with a garden hose when it's convenient, or skip the cleaning entirely and just swap in a fresh one each month. The 4-pack is sized to make that monthly rhythm easy.
Bullfrog®
Bullfrog® Brand FAQs
What makes Bullfrog Spas different from other hot tubs?
The defining difference is the patented JetPak Therapy System®. Instead of building jets permanently into the spa shell, Bullfrog puts them into modular seat inserts called JetPaks® that the owner can rearrange, swap between seats, or upgrade over time. This also means far less conventional plumbing runs under the shell, which simplifies the spa and reduces the number of potential leak points compared with a traditional jetted hot tub.
What is the JetPak Therapy System?
The JetPak Therapy System® is a set of interchangeable, jetted spa seats — JetPaks® — each engineered to deliver a distinct hydromassage targeting specific areas like the back, neck, or shoulders, in different styles and intensities. Owners choose the JetPaks that fit their needs and can change them out later as those needs evolve. It's what lets two people personalize the same spa to very different preferences, and what makes a Bullfrog upgradeable rather than fixed.
Are Bullfrog Spas made in the USA?
Yes. Bullfrog Spas are assembled in the United States at the company's manufacturing facility in Herriman, Utah, in the greater Salt Lake City area, with the majority of components sourced domestically. The company was founded in 1996 and has maintained U.S.-based production as a core part of its identity, citing quality control and consistency as key reasons for building at home.
Are Bullfrog Spas reliable and energy efficient?
Reliability is one of the brand's signature claims, and it traces directly back to the JetPak design: with most of the jets and plumbing housed in the JetPaks themselves, a Bullfrog uses much less conventional pipework than a typical hot tub, which means fewer fittings and fewer places a leak can develop. The spas are built on a wood-free EnduraFrame and designed for energy efficiency, with insulation and engineering aimed at holding heat and reducing running costs.
What warranty comes with a Bullfrog Spa?
Bullfrog backs its spas with one of the stronger warranty programs in the industry, which can include up to a lifetime structural frame warranty and up to a 10-year shell warranty, along with coverage on components and surface. The exact terms depend on the model and series you choose, so the manufacturer's warranty document for your specific spa is the definitive source. As your dealer, Leisure Time Inc. can help you understand your coverage and assist with filing any manufacturer warranty claim.
How do I maintain a Bullfrog Spa, and what filters does it use?
Day-to-day care is the same as any quality hot tub: keep your water balanced and sanitized, and keep the filter clean. Bullfrog's A, R, and X Series (2018–current) use a genuine coreless filter cartridge, while STIL and M Series models use their own specific filters — so it's important to match the cartridge to your exact series and model year. A typical routine is a weekly filter rinse, a monthly cleaner spray, a periodic deep soak, and a fresh cartridge about once a year. Leisure Time Inc. stocks the genuine Bullfrog filters and water care to keep that routine simple.
Not sure which series or model year you own? Check the filter fitment guide or reach out, and we'll confirm the right parts and care for your spa.
About Bullfrog®
Bullfrog Spas is a premium American hot tub manufacturer built around one big idea: that a spa should be personalized to the people using it. Founded in 1996 and headquartered in the greater Salt Lake City, Utah area, Bullfrog designs and builds the only luxury hot tubs and swim spas powered by the patented JetPak Therapy System® — a lineup of modular, interchangeable jetted seats that let owners customize, swap, and upgrade their hydromassage at any time.
That modular approach changed more than just the massage. Because each JetPak® carries its own jets and plumbing right at the seat, a Bullfrog spa uses dramatically less conventional pipework than a traditional hot tub — fewer hoses, fewer fittings, and fewer potential points of failure. Less plumbing under the shell means fewer places for a leak to start, which is a big part of why Bullfrog has earned its reputation for long-term reliability.
Bullfrog spas are assembled in the USA at the company's Herriman, Utah manufacturing facility, with the majority of components sourced domestically. The spas are built on a wood-free EnduraFrame structure, finished with durable acrylic shells, and engineered for energy efficiency. They're backed by one of the strongest warranty programs in the industry — including up to a lifetime structural frame warranty and up to a 10-year shell warranty, with specific coverage varying by model.
Today the brand's core hot tub lineup spans several series — including the flagship A Series, the value-focused R Series and X Series, and the streamlined STIL and M Series models — alongside swim spas, all sharing the same JetPak-driven design philosophy. Whether you want deep-tissue back relief, a gentle full-body soak, or a swim-in-place workout, a Bullfrog can be configured around it.
As an authorized retailer, Leisure Time Inc. carries genuine Bullfrog replacement filters, JetPak-compatible water care, and spa parts and accessories, with nationwide shipping on most orders and showroom support for customers in the Idaho region.
