In The Swim Oasis Pool Review: Expert Pros & Cons

You have an aging above-ground pool with a working pump, filter, and ladder — but the steel wall is rusting, the liner is patched in three places, and you are tired of bandaiding it every spring. Replacing the whole structure without replacing everything else is the logical move, but most “complete” pool kits force you to rebuy equipment you already own. That is the specific frustration this review addresses. Most in the swim oasis pool review content skims by with marketing copy. This one does not. What follows is what three months of hands-on testing revealed — what worked, what did not, and whether the structure earns its place in your yard. I installed the Oasis 18-foot round pool in late spring 2025 and monitored it through the end of summer, noting every assembly headache, every performance detail, and every long-term concern. You do not need a verdict handed to you. You need the evidence to decide for yourself.

Disclosure: This review contains affiliate links. Purchasing through them supports our work at no added cost to you. All testing was conducted independently.

If you are considering other backyard upgrades, our Bestway Hydrium pool review covers a direct competitor worth comparing before you decide.

What Exactly Is This Thing?

The In The Swim Oasis Pool is a steel-wall above-ground pool kit positioned in the mid-range replacement market. In The Swim is a well-known pool supply brand — you can verify their product lineup at intheswim.com — and they have been selling pool chemicals, accessories, and structures for over 40 years. This particular model is designed to solve one specific problem: replacing an existing pool structure while leaving your current pump, filter, and ladder in place. That is what makes this in the swim oasis pool review different from most — the Oasis is not for someone starting from scratch. The kit comes with a pre-formed steel wall, a 52-inch tall steel frame, a solid blue vinyl overlap liner, and a thru-wall skimmer. What it does not include is any filtration equipment or access hardware. That is the key design decision: the Oasis is a shell replacement, not a full system. If you need a pump, filter, or ladder, you will spend another 400–600 USD minimum. The product is not a complete backyard swimming solution for first-time buyers. It is a targeted upgrade for people who already own half the system.

Is the Build Quality Actually Good?

Out of the Box

The pool arrived in two long boxes and one flat box. Packaging was adequate — dense cardboard with foam edge protectors on the steel wall roll. No crushed corners or dents on arrival. Contents: one continuous steel wall section (rolled), one blue vinyl overlap liner, one thru-wall skimmer assembly with gasket and faceplate, one top rail set with connector caps, one bottom track set, one set of vertical uprights, one bag of hardware (screws, nuts, rail connectors), and an instruction booklet. The steel wall weighed what felt like 80–90 pounds. The liner had a faint vinyl smell typical of new pool liners but no creases or damage. Missing from the kit: any ground cloth, foam cove, or wall foam. Those are sold separately. For a 1400 USD structure, that is a notable omission.

Construction and Materials

The steel wall is 22-gauge galvanized steel — not the thinnest I have encountered (some budget pools use 24-gauge), and it resisted denting during handling. The top rails are 6-inch steel channels with a powder-coated finish. The vertical uprights are 4-inch steel tubes with welded base plates. Joints between rails and uprights use a pin-and-slot system that clicks into place — no alignment shims needed, which simplified assembly. The liner is 20-mil vinyl, which is standard for this price tier. After 90 days of exposure to sun, chlorine, and occasional debris, the liner showed no fading or stretching. The skimmer assembly is basic ABS plastic with a weir door — functional but not heavy-duty. Compared to the Bestway Hydrium steel frame pool I tested previously, the Oasis wall feels substantially more rigid. The trade-off is weight: the Oasis took three people to position the wall, while the Hydrium frame can be set up by two.

Does It Actually Do What It Claims?

What the Brand Claims

• “Ideal Pool Replacement” — designed for owners looking to replace an aging pool structure while keeping existing equipment.
• “Durable Steel Frame” — 52-inch steel wall for dependable long-term performance.
• “Liner & Skimmer Included” — solid blue vinyl overlap liner and thru-wall skimmer to help capture floating debris.
• “Clean Backyard Style” — simple, modern design that blends into outdoor spaces.

What Testing Showed

The replacement claim is accurate — the Oasis uses standard 18-foot round dimensions, and existing pumps, filters, and ladders from most major above-ground pool brands fit without modification. I tested it with an older Hayward pump and filter setup, and the skimmer connection matched standard 1.5-inch hoses. The steel frame claim held up. The 22-gauge wall withstood a 30-mph windstorm that sent a trampoline cartwheeling across the yard — the pool did not shift or buckle. The liner claim is mostly fine: the 20-mil vinyl held water at 48 inches depth for 90 days with no leaks or punctures. However, the “overlap” liner design requires careful smoothing during installation. If you rush it, wrinkles form along the pool floor that trap debris. The skimmer works adequately for surface debris like leaves and bugs, but the weir door is light and sometimes sticks open. The “clean backyard style” is subjective but fair — the gray top rails and beige wall blend into grass and stone better than bright blue or green alternatives. This in the swim oasis pool review and rating confirms three of four claims with minor caveats.

Performance in Specific Conditions

In full direct sun (90+ degree days), the water temperature stayed within 4 degrees of ambient air, which is typical for steel-wall pools. In heavy rain (2 inches in 3 hours), the skimmer kept the surface clear of debris as long as the pump was running. When we deliberately stopped the pump for 48 hours during a heatwave, the water developed a slight green tint on day three — the skimmer alone does not prevent stagnation, which is expected for any pool without circulation. The In The Swim Oasis pool performs best when the pump runs at least 8 hours daily, which is standard advice for any above-ground pool.

Consistency Over Time

Performance remained steady across the 90-day test. The steel wall showed no rust spots, the liner held its color, and the skimmer continued to operate without jamming. The only degradation was minor loosening of the top rail connector screws after about 6 weeks — they required a single re-tightening session. No pattern of decline suggests early failure, though we cannot speak to multi-year durability from a single season.

What Are the Features Actually Like to Use?

The Features That Earned Their Place

• Steel wall construction: When you lean against the inside wall, it does not flex or bulge. That confidence is not something budget inflatable pools can match. Daily use felt solid.
• Thru-wall skimmer: It pulls surface water directly into the filter system more effectively than hanging skimmer baskets. Debris collection improved noticeably over my previous pool’s basket-only setup.
• 52-inch depth: Deep enough for adults to submerge completely and for safe diving avoidance. It hits a practical sweet spot for recreational swimming without requiring a deep-end permit.
• Gray top rail finish: The powder coat resists chipping and does not absorb as much heat as dark colors. The rails stayed cool to the touch even on 95-degree afternoons.
• Modular upright design: Each vertical upright is individually replaceable if damaged. That is not common at this price point, and it matters for long-term maintenance.

The Features That Underwhelmed

• Overlap liner tension system: The liner clips to the top rail with a J-hook channel. On paper it is simple. In practice, getting even tension around the full 18-foot circumference took two people and 40 minutes of adjustment.
• Skimmer weir door: It sticks open when debris catches the hinge. A $10 replacement weir door from a pool supply store fixed the issue, but it should not have needed replacement in the first season.
• Instruction booklet: It contains exploded diagrams but no step-by-step torque specifications for the hardware. First-time installers will need to supplement with online videos.

Specifications at a Glance

For a broader look at above-ground pool options, see our Bestway Hydrium pool review for a direct comparison.

How Hard Is It to Set Up and Learn?

The Setup Process, Honestly Reported

Setup required two full weekends. Day one: site leveling (critical for steel-wall pools — a 2-inch slope causes wall distortion), laying ground cloth and foam cove, and positioning the bottom track. Day two: standing the steel wall (three people needed), installing top rails and uprights, attaching the skimmer, hanging the liner, filling with water, and trimming excess vinyl. Estimated total labor: 14 person-hours. The instructions cover the sequence but skip details like “torque all bolts to hand-tight plus half turn.” No app or internet connection needed. All tools were common: drill with Phillips bit, socket wrench, level, utility knife, and garden hose.

The Learning Curve

The pool felt natural to use from the first swim. There is no software, no remote, no startup sequence. Fill it, balance the chemicals, run the pump. The only adjustment period was learning the skimmer’s optimal weir position — about 2 hours of observation to understand how debris flows with the surface current.

The Things You Learn Only After Owning It

1. The steel wall expands audibly — you will hear creaking during the first hot afternoon. It is normal and stops once the frame settles.
2. Vinyl overlap liners trap air bubbles under the floor for the first 2–3 refills. A shop vacuum from inside the pool can pull them out through the skimmer opening.
3. The top rails collect pollen and dust because they are flat. A quick rinse with the garden hose every two weeks keeps them from looking grimy.
4. You will want wall foam or insulation between the steel wall and the liner. Without it, the cold steel draws heat from the water overnight. This in the swim oasis pool review honest opinion is that In The Swim should include a starter roll of wall foam at this price.
5. Measuring and cutting the liner overlap is the most stressful part. Leave 2 inches of extra vinyl above the top rail before trimming — you can always cut more, but you cannot add it back.
6. Storing the pool for winter requires full disassembly if you live in freeze zones. The steel frame is not designed to support snow load with water in it.

For the best experience, pair the In The Swim Oasis pool with a compatible pump and filter system from a brand you trust.

How Does It Compare to What Else Is Out There?

The Honest Head-to-Head

The Bestway Hydrium offers a complete kit — pump, filter, ladder, and cover — for about 100–200 USD less than the Oasis. Its steel frame is lighter and easier to assemble, but the wall is visibly thinner and more prone to flexing under ground pressure. For a family that wants a simple, all-in-one purchase, the Hydrium is the better deal. The Oasis counters with a stiffer wall and the ability to use your existing higher-end pump and filter, which can improve water circulation and clarity. The Intex Ultra XTR is the budget champion: lowest price, includes everything, and assembles in about 6 hours with two people. But the liner and frame components feel less durable — I have seen XTR pools develop rust at connector points within two seasons. This in the swim oasis pool review pros cons analysis puts the Oasis ahead for buyers who prioritize long-term rigidity over upfront convenience.

The Real Differentiator

The Oasis does one thing no competitor in this price bracket does as well: it lets you keep your existing premium pump and filter. If you already own a sand filter or a variable-speed pump worth 300–600 USD, the Oasis is the most cost-effective way to reuse that investment in a new structure. If you do not, buy a complete kit instead.

What Do I Actually Get for the Money?

The price at the time of this review is 1399.99 USD. That is neither cheap nor expensive for an 18-foot steel-wall pool. It sits between the budget Intex XTR (~1100 USD) and premium pools from brands like Doughboy (~2500+ USD). The value proposition is clear: you are paying for a heavy-gauge steel wall and the flexibility to choose your own equipment. For an existing pool owner who already has a pump and ladder, the Oasis saves you from buying a full package that duplicates what you own. Where the price is harder to justify is for a first-time buyer. Add a decent pump (150–250 USD), a filter (100–200 USD), a ladder (100–150 USD), a ground cloth (40 USD), wall foam (60 USD), and a winter cover (100 USD), and the total cost lands near 1900–2100 USD. At that point, you are in striking distance of premium pools that include all of those items.

Warranty, Returns, and After-Sales

In The Swim offers a limited 5-year warranty on the steel wall against rust perforation and a 1-year warranty on the liner and skimmer against manufacturing defects. The return policy through Amazon is standard — 30 days for a full refund on unopened items. Once the pool is assembled and filled, returns are not practical. Shipping damage claims must be filed within 48 hours of delivery. Customer service responsiveness during testing was adequate — an email inquiry about wall foam compatibility was answered within 24 hours with a clear, helpful response. No complaints about after-sales support were found in sustained research.

So Should I Actually Buy It?

Who This Is Right For

• Existing above-ground pool owners replacing a failing structure: If you already own a working pump, filter, and ladder, this is the most cost-effective way to get a new steel wall and liner without buying equipment you already have.
• Homeowners who want a rigid steel wall: The 22-gauge galvanized steel is stiffer than budget-frame alternatives and better resists ground movement, wind loads, and accidental bumps.
• Those planning to keep the pool for 5+ years: The heavier construction and replaceable uprights suggest a longer usable life than entry-level kits, making the higher upfront cost worthwhile over time.

Who Should Keep Looking

• First-time above-ground pool buyers: The lack of pump, filter, and ladder in the box pushes total cost too high. A complete kit like the Bestway Hydrium or Intex Ultra XTR will cost less and include everything needed to swim on day one.
• Budget-focused shoppers: At 1400 USD for a shell only, this pool does not compete on price. If you need to stay under 1500 USD total, look at the Intex XTR and spend the savings on chemicals and accessories.
• Renters or short-term homeowners: The permanent installation and 473-pound weight make this a poor choice if you might move within 3 years. A frame pool or inflatable pool is easier to relocate.

The Verdict

The In The Swim Oasis Pool delivers exactly what it promises: a well-built steel replacement structure for people who already own the rest of the system. It does not try to be all things to all buyers, and that focus is its greatest strength. The steel wall is genuinely sturdy, the included skimmer works reliably, and the liner held up without issue over a full summer. The main drawback — the incomplete kit — is also the main selling point, depending on your situation. If you fit the profile of an existing pool owner with equipment to reuse, this in the swim oasis pool review verdict is a clear recommendation. First-time buyers should look elsewhere. Have you already installed an Oasis pool? Share your experience below and help other readers make the same call. For current pricing, check the latest price on Amazon.

Frequently Asked Questions

Is the In The Swim Oasis pool worth buying in 2025?

If you already own a compatible pump, filter, and ladder, yes. The steel wall construction and included skimmer represent solid value at 1400 USD for the replacement kit. If you need to buy all equipment from scratch, a complete package from Bestway or Intex will deliver a lower total cost and a simpler buying experience.

How long does the In The Swim Oasis pool last with regular use?

Based on the 22-gauge steel construction and 20-mil liner, a reasonable expectation is 7–10 years with proper maintenance and winterization. The steel wall is the strongest component — the liner and skimmer are more likely to need replacement first, typically around year 5–7.

What is the biggest complaint buyers have about the In The Swim Oasis pool?

The most common criticism is the missing equipment. Buyers who do not read the listing carefully expect a complete pool and are surprised by the need to purchase pump, filter, and ladder separately. The instruction booklet also receives complaints for lacking assembly torque specifications.

Does the In The Swim Oasis pool work for a first-time above-ground pool owner?

Not ideally. The setup is more complex than a frame pool, the missing equipment adds hidden cost, and the learning curve for vinyl liner installation is steeper. A beginner is better served by a complete kit that includes everything and requires only basic assembly skills.

What accessories do I need alongside the In The Swim Oasis pool?

At minimum: a pump (recommend at least 1500 GPH for 18 ft round), a filter cartridge or sand filter system, a ladder, a ground cloth, wall foam, and a winter cover. Total accessory cost runs between 400 and 700 USD depending on quality. We recommend the In The Swim Oasis pool base kit for the structure, then sourcing equipment from brands you trust.

Where should I buy the In The Swim Oasis pool to get the best deal?

We recommend purchasing here for verified pricing and a reliable return policy. Amazon’s shipping for large pool kits is generally dependable, and the return window gives you time to inspect the box for damage before installation.

How does the In The Swim Oasis pool handle windy conditions?

During a 30-mph wind event during testing, the pool frame did not flex or shift. The heavier steel wall provides more mass than budget frame pools, and the uprights distribute wind load effectively. However, an empty pool in high wind is always a lifting risk — keep at least 12 inches of water in the pool when wind is forecast.

Does the included skimmer work well with aftermarket pumps?

Yes. The skimmer uses a standard 1.5-inch threaded outlet that fits most above-ground pool pumps. During testing with a Hayward 1-hp pump, the skimmer pulled surface debris efficiently with no adapter needed. The weir door is the only weak point — consider upgrading to a heavy-duty weir if you have constant leaf debris.