The Round Spa With Spillover by Thursday Pools brings the health benefits of hydrotherapy to your own backyard in a form that belongs there permanently. Built as a fiberglass pool accessory or a standalone feature, the Round Spa has room for seven people, delivers the bubbling water jets and relaxation that help relieve muscle tension, reduce stress, and promote better sleep, and includes a spillover water feature that creates both visual appeal and the ambient sound of moving water. For the Ohio family that wants more from their outdoor space than a swim lane, the Round Spa is the complement that turns a pool into a full backyard wellness destination. And for households without a primary pool, it stands entirely on its own as a year-round feature that earns its place in the yard every single season.
Round Spa With Spillover Thursday
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Get to a Healthier You
What Is the Round Spa With Spillover?
The Round Spa With Spillover is a circular fiberglass inground spa. It comes in one size: O.D. 8’6″ x 8’6″ with a 3′ depth, inside dimensions of 7’6″ x 7’6″, and a water volume of 800 gallons. Thursday Pools describes the Round Spa as having room for seven people, a social capacity that sets it apart from private plunge spas and makes it genuinely useful for family gatherings and entertaining alongside the pool.
The spillover feature creates a water flow from the Round Spa into an adjacent pool or deck area, producing a visual and auditory effect that adds ambiance to the entire pool area. The Round Spa includes the same non-skid gel coat surface that Thursday Pools uses across all of their designs, and it is auto-cover ready, allowing for a safety and maintenance cover to keep the water clean and inaccessible when not in use.
What the Round Spa With Spillover Is Not
The Round Spa is not a swimming pool, a lap pool, or a large soaking vessel. Its 800-gallon volume and 3′ depth are designed for seated or semi-reclined hydrotherapy and conversation, not for moving around or swimming. It is also not the Grand Spa, which at 11’6″ x 11’10” is Thursday Pools’ largest spa design. If you want maximum capacity, greater interior space, or a spa that functions more like a private resort-style plunge, the Grand Spa is the right direction.
The Round Spa is also not a rectangular shape. Its circular footprint is a deliberate design choice that suits certain yard layouts and aesthetic preferences over others. Homeowners who want clean right-angle lines to match a rectangular pool or patio grid may find the Square Spa a better visual fit. What the Round Spa offers in return is a softer, more organic form that complements freeform pool designs, natural landscaping, and yards where a curved silhouette works beautifully.
Why Thursday Pools?
Thursday Pools is the only fiberglass pool and spa manufacturer in the United States to hold ISO 9001 certification for quality management. They also hold ISO 14001 certification for environmental stewardship. Both are independently audited designations that govern the manufacturing process at their Fortville, Indiana facility, and both apply to every product that comes out of that facility, including the Round Spa With Spillover.
The non-skid gel coat finish on the Round Spa is the same algae-resistant, foot-friendly surface Thursday Pools applies to all of their designs. On a spa where people are typically seated in warm, jetted water, a non-skid floor and bench surface is not a cosmetic choice but a safety one. Thursday Pools builds it in as a standard feature, not an optional upgrade.
The Round Spa is also auto-cover ready, which is specifically important for Ohio’s climate. A spa left uncovered through Ohio’s fall and winter accumulates debris, loses water to evaporation, and drifts from chemical balance faster than a covered spa. Thursday Pools designs the Round Spa to accept an automatic cover system, protecting the investment and reducing the startup work each spring.
Why Fiberglass, and Why the Round Spa With Spillover?
A portable above-ground spa degrades under UV exposure, loses water temperature faster in cold months, and carries ongoing maintenance demands that a fiberglass inground spa does not. The Round Spa With Spillover is a permanent, inground installation built from the same fiberglass construction as Thursday Pools’ full-size pool designs. The gel coat surface resists algae and staining without the scrubbing or resurfacing that a concrete spa would require, and there is no acrylic shell to crack or discolor over time.
At 800 gallons, the Round Spa heats efficiently. The smaller the water volume, the faster and less expensive it is to bring the water to a therapeutic temperature. For Ohio households who want to use their spa well into the fall and through cold winter weekends, the Round Spa’s compact volume means heating costs stay manageable. The spillover feature also creates a built-in water feature when the spa and pool are operating together, eliminating the need for a separate fountain or water feature installation.
Ready to Soak Away the Day?
Your backyard can do more than it does right now. The Round Spa With Spillover by Thursday Pools is how you add daily wellness, ambiance, and social space to your outdoor living area in a form that lasts. At Ohio Paradise Pools, we have been serving Northeast Ohio families for over 32 years and we handle every aspect of your installation from site planning through finishing work and pool school. We are family-owned, full-service, and we stay with you long after the project is complete.
Call us today at (440) 610-5484 or schedule a free consultation to start planning your Round Spa installation in Edison Park and the surrounding Ohio communities.
Available Sizes
Not everyone wants to be a square.
Round Spa With Spillover FAQs
How many people does the Round Spa hold, and how does it work as a social space?
Thursday Pools specifies that the Round Spa has room for seven people. That capacity makes it meaningfully different from two-person or four-person portable spas, and it is large enough to serve as a genuine gathering point for family or guests alongside the primary pool. The circular shape creates an inward-facing arrangement where everyone can see and speak with each other comfortably, which is why Thursday Pools emphasizes it as “a nice space to chill and chat with friends.” For the ideal client who invests in a pool for family and entertaining, the Round Spa at seven-person capacity becomes part of how the whole backyard functions on a busy summer evening.
What health benefits does the Round Spa provide?
Thursday Pools specifically notes that a spa can help promote better sleep, relieve muscle tension and aches, and serve as a highly effective way to de-stress. These are the documented benefits of warm-water hydrotherapy, which works by increasing circulation, relaxing muscle tissue, and allowing the body to release tension held in the joints and lower back. For adults in active households or physically demanding careers, a regular hydrotherapy routine in the Round Spa can be genuinely restorative in a way that a swim lap or a cold pool cannot replicate. The 3′ depth keeps the spa at a seated soaking level, and the compact 800-gallon volume means the water reaches and holds therapeutic temperature efficiently.
What does the spillover feature add to the Round Spa?
The spillover creates a controlled water flow from the Round Spa into the adjacent pool or over a deck surface, producing both a visual water feature and the ambient sound of moving water. When the spa and pool are running together, the spillover effectively serves as a built-in water feature for the broader pool area, adding movement and sound to the overall experience without requiring a separate fountain or cascade installation. The spillover also has a mild recirculating benefit, moving water between the spa and pool when both are operating together. Ohio Paradise Pools will help you plan how the spillover integrates with your specific pool design during the design phase.
Can the Round Spa be installed without a primary pool?
Yes. The Round Spa can function as a standalone inground spa rather than as a complement to a primary pool. Thursday Pools describes it as a feature that adds value to a pool deck, but it operates as an independent structure with its own water volume, plumbing, and heating. For households that want a permanent hydrotherapy feature without the commitment of a full swimming pool, the Round Spa is a practical and elegant solution. Ohio Paradise Pools has installed companion structures as standalone features and will scope your project accordingly based on your goals.
How does the Round Spa compare to the Square Spa and Grand Spa from Thursday Pools?
The Round Spa With Spillover, Square Spa, and Grand Spa share the same purpose but differ in shape, size, and capacity. The Round Spa measures 8’6″ x 8’6″ with an 800-gallon volume and a circular shape. The Square Spa is 9′ x 9′ with 900 gallons and right-angle corners, available with or without a spillover. The Grand Spa is Thursday Pools’ largest spa design at 11’6″ x 11’10”, offering a resort-scale soaking experience with significantly more interior space. Choosing between the three comes down to aesthetic preference (round vs. square), yard integration, and how large a social and soaking space you want. Ohio Paradise Pools can help you compare all three in the context of your specific yard and primary pool plan.
Is the Round Spa auto-cover ready, and why does that matter in Ohio?
Yes. Thursday Pools designed the Round Spa to accept an automatic safety cover. In Ohio, where the outdoor season runs roughly from mid-May through September, a spa that is not covered during the remaining seven months is exposed to falling debris, temperature swings, and evaporation. These factors drive up chemical costs and increase the work required to rebalance and clean the spa before each use. An auto cover eliminates that problem, keeping the water protected and reducing both startup effort and ongoing chemical consumption. For a small-volume structure like the Round Spa’s 800 gallons, maintaining water quality between uses is relatively simple, and a cover makes it even more so.
What maintenance does the Round Spa require compared to a portable above-ground spa?
The Round Spa’s fiberglass shell with Thursday Pools’ non-skid gel coat finish resists algae growth and does not require the periodic liner replacement that portable or vinyl-shell spas demand. Routine maintenance involves testing and adjusting water chemistry, running the filtration and jet systems, and skimming or draining periodically as needed. The 800-gallon volume is small enough that a full water change, when needed, is a manageable task. By contrast, acrylic portable spas are subject to UV fading, shell cracking under temperature extremes, and the degradation of their mechanical components from exposure to outdoor conditions. An inground fiberglass spa installed with proper plumbing by a qualified team like Ohio Paradise Pools is built to perform for decades, not seasons.
How does installation work for the Round Spa?
The Round Spa is installed as an inground structure, meaning excavation, shell placement, plumbing, and electrical work are all part of the installation scope. When the Round Spa is added alongside a primary Thursday Pools pool design, the two are typically installed in the same project phase with integrated plumbing. When installed as a standalone structure, the process is similar but scaled to the Round Spa’s footprint only. Ohio Paradise Pools manages the complete process from permitting through installation and pool school. Most spa installations as part of a primary pool project add minimal time to the overall project timeline, and standalone spa installations are similarly fast given the Round Spa’s compact one-piece shell.
Does the Round Spa carry a warranty?
Yes. Thursday Pools backs the Round Spa With Spillover with a lifetime structural warranty on the fiberglass shell and a 15-year surface warranty on the gel coat finish, the same warranty terms that cover their full-size pool designs. The structural warranty covers the shell against material and workmanship defects. The surface warranty covers the gel coat against delamination and structural coating failure. Ohio Paradise Pools adds over 32 years of local installation experience, an A+ BBB rating, and three consecutive years as Cleveland’s swimming pool contractor of the year (2022, 2023, 2024) to that manufacturer coverage.
When is the Round Spa a better choice than adding a built-in spa to the primary pool?
Some Thursday Pools designs, like the Mack Daddy, include a fully integrated spa as part of the pool shell itself. The Round Spa and Square Spa are separate standalone structures that sit adjacent to a primary pool and allow you to add spa functionality to any Thursday Pools design in the catalog, including models where an integrated spa is not part of the shell. If you want the architectural presence of a distinct, separate circular spa on your pool deck, or if you want to add spa capability to a pool model that does not include an integrated spa, the Round Spa is the right approach. Ohio Paradise Pools will help you evaluate which option fits your primary pool choice, yard layout, and project budget.