In The Swim Oasis pool review: Honest Pros & Cons Worth Buying?

Is your old above-ground pool starting to show its age? Maybe the wall is bowing, the liner is beyond patching, and you’re dreading another season of bandaiding a sinking ship. If you already own a pump, filter system, and ladder, replacing the entire pool structure should be straightforward and affordable. That’s exactly where the In The Swim Oasis 18 ft Round Above Ground Swimming Pool comes into play. After spending several weeks setting up, testing, and living with this pool, I’m ready to share an honest In The Swim Oasis pool review that cuts through the marketing hype. Whether you’re considering a pool replacement or building from scratch, this review will help you decide if the Oasis pool is the right fit for your backyard. We’ll cover build quality, installation ease, real-world performance, and value for money. Let’s dive in.

What Is In The Swim Oasis 18 ft Round Above Ground Swimming Pool?

The In The Swim Oasis is an 18-foot round above-ground pool kit designed primarily as a drop-in replacement for homeowners who already have peripheral equipment like a pump, filter, and ladder. Manufactured by In The Swim – a well-known brand in the pool industry with decades of experience (check their official site In The Swim) – this pool features a 52-inch tall steel wall, a solid blue vinyl overlap liner, and a thru-wall skimmer. It targets the homeowner who wants durable construction without paying for a full package they don’t need. The Oasis pool occupies a sweet spot in the market: priced competitively against other replacement pools but built with thicker steel and a better liner than budget alternatives. In my In The Swim Oasis pool review and rating, I found it delivers exactly what it promises if you meet the prerequisites.

Key Features & Specifications

Standout Features

• Steel Wall Construction: The 52-inch steel wall is galvanized for rust resistance and designed to withstand ground pressure and seasonal temperature changes. It’s thicker than many entry-level pools, providing confidence for years of use.
• Solid Blue Overlap Liner: The included liner is a heavy-gauge vinyl with overlap design, making installation easier since you don’t need to measure or cut a custom liner. The solid blue gives a clean, classic look.
• Thru-Wall Skimmer: Skims surface debris efficiently. The skimmer housing is pre-cut compatible, but you’ll need to cut the liner during installation (template included).
• Replacement-Focused Design: No pump, filter, or ladder included – this keeps the price low and avoids waste for owners upgrading.
• Durable Steel Frame Components: Top rails, uprights, and bottom plates are all heavy-duty steel with a powder-coated finish.

Technical Specifications

Specification	Value
Product Dimensions	216 x 216 x 52 inches (18 ft round)
Item Weight	473 pounds
Manufacturer	In The Swim
Model Number	LESFOX1852LESQ
Liner Type	Overlap, 52-inch tall, solid blue
Wall Gauge	0.036 inch (approx. 20 ga.)
Pool Volume (approx)	5,800 gallons (at 48″ water depth)
Included Accessories	Steel wall, liner, skimmer, hardware

These specs confirm that the In The Swim Oasis pool kit is a substantial structure. It’s not a lightweight seasonal pool; it’s built for semi-permanent installation. For a related comparison, check our Bestway Hydrium pool review for another mid-range option.

What’s Included in the Box

When the two heavy boxes arrived (total weight 473 lbs), I was impressed by the packaging. Each component was wrapped and padded to prevent damage. Inside you’ll find:

• Steel pool wall (rolled and banded) with pre-punched holes
• Solid blue overlap liner (52″ x 18 ft round)
• Thru-wall skimmer with gasket and screws
• Complete hardware kit: top rails, uprights, bottom plates, lock plates, coping strip
• Vinyl liner hanger (to attach liner to wall)
• Tape for wall seam
• Instruction manual (clear, but could use more visuals)

Missing items: pump, filter, ladder, ground cloth, sand or foam cove (not included – you must purchase separately). The liner felt thicker than the budget overlap liners I’ve seen, and the steel wall had a smooth finish with no sharp edges. First impressions were solid.

How to Use In The Swim Oasis 18 ft Round Above Ground Swimming Pool: Complete Guide

Step 1: Initial Setup and Installation

Installation requires at least two capable people and a full day. Start by leveling the ground to less than 1 inch variation across the 18 ft diameter. Lay a ground cloth (not included) then assemble the bottom track and uprights. Unroll the steel wall and connect using the provided tape and fasteners. I used a rubber mallet to seat the wall in the bottom track. The wall went up smooth but watch your fingers on the pre-punched holes. Once the wall is a complete circle, install top rail and coping. The liner goes on next: drape over the wall, use the liner hanger to hook it, then pull evenly to remove wrinkles. Fill with about 1 inch of water to seat the liner, then continue filling while adjusting folds.

Step 2: First-Time User Guide

After the pool is filled to proper level (about 48″ water depth), install the thru-wall skimmer by cutting the liner per the template. Hook up your existing pump and filter system (assumes you have them). Add a ladder if you have one. Prime and start filtration. The water clarity improved quickly within hours.

Step 3: Core Functions and Daily Use

Daily use is straightforward: enjoy swimming, but keep an eye on water chemistry. The skimmer does its job collecting leaves and bugs. The steel wall feels sturdy when leaning against it. The liner is smooth and comfortable. I recommend using a pool cover when not in use for extended periods.

Step 4: Advanced Techniques

For experienced pool owners, consider adding a sand filter or upgrading to a saltwater system. The Oasis wall is compatible with standard above-ground pool accessories. Pro tip: install a foam cove around the bottom inside edge to prevent liner damage from the wall seam.

Step 5: Maintenance and Care

Weekly maintenance includes skimming, brushing, chemical balancing, and backwashing your filter. At season’s end, drain below the return line, cover securely, or disassemble for winter storage. The steel wall will last longer if you apply a rust inhibitor on any scratches.

Step 6: Troubleshooting Common Issues

If the liner wrinkles excessively, drain and reseat. If the wall shows rust spots, clean and paint with rust converter. Skimmer leaks? Check the gasket alignment. For air in the return line, prime the pump properly.

Throughout our testing, the In The Swim Oasis pool review honest opinion is that installation is manageable for handy homeowners, but not a trivial afternoon project. Having a helper made a huge difference. For more detailed maintenance tips, see our quietcool qc-es-4700-rf review which touches on general gear upkeep.

Performance & Real-World Testing

Testing Methodology

I set up the Oasis pool in my backyard in early June and used it daily for six weeks. I documented each phase: installation effort, water capacity retention, liner durability against sunlight and chemicals, wall stability under wind loads, and overall swimming experience. I also monitored rust formation and skimmer efficiency.

Performance Metrics

The pool holds water perfectly; no leaks after 40 days. Water temperature warmed nicely in sun; the blue liner helped retain heat. The steel wall never showed deflection despite a few high-wind days. The skimmer captured most floating debris, but the overflow cutout could be larger. Filtering with a 1 HP pump was adequate.

Real-World Scenarios

I hosted a small pool party with five adults and two kids. The pool felt spacious for recreation. The wall height (52 inches) is comfortable for leaning and splashing. One concern: the overlap liner requires careful tension; I noticed slight wrinkling on one side after refilling post-cleaning, but it settled over time.

Claims vs. Reality

In The Swim claims the Oasis is a durable replacement pool. I found the steel wall to be robust, but the liner could be thicker for longevity. The skimmer works but isn’t as efficient as a wide-mouth model. Overall, the pool meets expectations for its price point. In my In The Swim Oasis pool review pros cons breakdown, performance is a win except for minor liner concerns.

Pros and Cons

What We Loved (Pros)

• Superior Steel Wall: Thicker than many competitors, resists bowing and rust well.
• Replacement-Friendly: Perfect for owners with existing equipment; saves money.
• Included Skimmer: Saves $50+ vs buying separately; decent quality.
• Clean Appearance: Solid blue liner and dark gray frame look modern.
• Good Hardware Kit: All components present; no missing bolts or difficult parts.

What Could Be Improved (Cons)

• Liner Could Be Thicker: Overlap design is fine, but gauge feels marginal for heavy use.
• Instructions Are Basic: Text-heavy; more diagrams would help first-time installers.
• No Ground Prep Materials: Must buy paver pads, cove, and ground cloth separately.

Balance is key: for the price, you get a solid pool structure. The In The Swim Oasis pool review and rating takes these pros and cons into account.

In The Swim Oasis 18 ft Round Above Ground Swimming Pool vs. Competitors

How does the Oasis compare to other popular 18-foot round above-ground pools? I looked at two direct competitors: the Intex Ultra XTR 18 ft and the Bestway Steel Pro Max 18 ft. Below is a comparison table.

Feature	In The Swim Oasis	Intex Ultra XTR 18 ft	Bestway Steel Pro Max 18 ft
Wall Material	Steel (0.036″)	Steel (0.038″)	Steel (0.030″)
Liner Type	Overlap, solid blue	Krystal Clear (overlap)	Overlap, printed pattern
Skimmer Included	Yes (thru-wall)	No (separate purchase)	No
Pump/Filter Included	No	Yes (1,500 gph sand filter)	Yes (1,000 gph cartridge)
Price (approx)	$1,400	$1,300 (with pump)	$900 (with pump)
Warranty	Limited (wall 5 yrs, liner 2 yrs)	1 year	1 year
Best For	Replacement / equipment owners	Complete package buyers	Budget-conscious first-timers

When to Choose This Product

Choose the Oasis if you already have a pump and filter, want a thicker steel wall than budget pools, and prefer a skimmer included. It’s the most cost-effective way to replace an aging pool without duplicating equipment.

When to Consider Alternatives

If you’re starting from scratch and need everything, the Intex Ultra XTR with sand filter is a better all-in-one value. If your budget is tight, the Bestway Steel Pro Max is cheaper but with thinner materials. For more comparisons, read our MrCool Monoblock review for insight on buying vs. building.

Who Should Buy In The Swim Oasis 18 ft Round Above Ground Swimming Pool?

Ideal For:

• Existing Pool Owners Upgrading: If you have a functional pump/filter/ladder, this is your best bet for a simple swap.
• DIY Homeowners: With moderate skills, you can install this weekend project.
• Those Wanting Durability: The steel wall is stronger than typical blow-mold or resin pools.

Not Recommended For:

• First-Time Pool Buyers on a Budget: Without pump/filter, total cost will exceed $1,600+, making a complete package more economical.
• Small Yards: 18 ft requires generous space; consider a 15 ft or 12 ft option.
• Renters or Temporary Use: This is a semi-permanent structure; not easy to disassemble and move frequently.

Expert Tips for Maximum Value

Tip #1: Level the Ground Perfectly

Spend extra time leveling: within ½ inch across the diameter. Uneven ground stresses the wall and liner, leading to premature failure.

Tip #2: Upgrade the Liner if You Can

Consider purchasing a thicker beaded or unibead liner separately. The included overlap liner is adequate but a premium liner improves longevity and comfort.

Tip #3: Use a Ground Cloth and Cove

Always use a heavy-duty ground cloth and install a foam cove around the base. This prevents abrasion and liner damage at the wall-floor junction.

Tip #4: Invest in a Good Pump

Pair the Oasis with at least a 1 HP sand filter or cartridge filter. A variable-speed pump saves electricity.

Tip #5: Add Solar Cover on Cold Nights

A solar cover reduces evaporation and heating costs. It also keeps debris out when not swimming. Check pool covers on Amazon for compatible sizes.

Tip #6: Winterize Properly

Drain the pool below returns, blow out lines, and install a winter cover. If you store the wall, clean and dry it first to prevent rust.

Tip #7: Test Water Chemistry Weekly

Balanced water extends liner life. Use stain and scale products if your source water is hard.

Common Mistakes to Avoid

1. Mistake: Skipping ground preparation → Solution: Level and tamp soil; add sand if needed. Uneven base causes structural stress.
2. Mistake: Not using a cove → Solution: Install a foam cove along the wall bottom to protect liner from seam.
3. Mistake: Over-tightening bolts → Solution: Hand-tighten and then a quarter turn; overtightening can warp rails.
4. Mistake: Starting fill without smoothing liner → Solution: Adjust liner as you fill first few inches to minimize wrinkles.
5. Mistake: Ignoring rust spots → Solution: Sand and touch up with rust-inhibiting paint immediately.

Pricing & Where to Buy

The In The Swim Oasis 18 ft Round Above Ground Swimming Pool currently sells for $1,399.99 (price may vary by seller). Considering what’s included (steel wall, liner, skimmer), this is a competitive price for a replacement pool. Compared to buying a full package that you’d have to discard equipment from, you save $200-400.

Warranty & Support

In The Swim offers a limited warranty: 5 years on the steel wall (against rust perforation) and 2 years on the liner (defects). Customer support is contactable via phone and email; response times are reasonable based on online reports. Return policy through Amazon is 30 days, but the heavyweight means return shipping could be costly. Buy from an authorized seller to ensure warranty validity.

Final Verdict

Summary of Key Findings

After six weeks of real-world use, the In The Swim Oasis pool stands out as a durable, well-thought-out replacement pool. The steel wall is robust, the liner performs admirably for an overlap design, and the included skimmer is a bonus. It’s not for everyone: if you lack equipment, a complete package might be cheaper. But for existing pool owners, this is a top contender. My In The Swim Oasis pool review verdict is that it delivers solid value and deserves serious consideration.

Our Recommendation

If you already own a pump and filter and want a sturdy, long-lasting above-ground pool without paying for unnecessary extras, buy this pool. I rate it 4.2 out of 5 stars. The main drawback is the liner could be thicker; factor in a future upgrade. Overall, it is worth buying.

Bottom Line

The In The Swim Oasis is an honest product that fulfills its promise: a dependable replacement pool at a fair price.

Ready to upgrade your backyard? Buy the In The Swim Oasis pool now and enjoy summer fun. Have experience with this pool? Share your thoughts in the comments below!

Frequently Asked Questions

Is In The Swim Oasis 18 ft Round Above Ground Swimming Pool worth the money?

Yes, for the target audience. If you already have a pump and filter, you’re paying only for the shell and liner. The steel wall thickness and included skimmer justify the $1,400 price. It’s cheaper than buying a full package and discarding equipment. Long-term value depends on proper maintenance.

How does it compare to Intex Ultra XTR?

The Intex Ultra XTR includes a sand filter and pump for about $100 less, making it a better deal for first-time buyers. However, the Oasis has a slightly thicker wall and a better warranty on the wall. For replacements, the Oasis wins; for new setups, Intex is more convenient.

What’s the learning curve for beginners?

Moderate. Someone with basic DIY skills (leveling, using tools) can install it with a helper in 6-8 hours. The instructions are text-heavy; watching YouTube videos beforehand helps. Water chemistry management is standard and easy to learn.

What accessories or additional items do I need?

You’ll need a pump, filter system, ladder, ground cloth, foam cove, paver pads for uprights, and a pool cover. If you don’t have these, budget an extra $400-600. Check affordable pool pumps on Amazon that match 18 ft pools.

What warranty and customer support does it offer?

Limited warranty: 5 years on steel wall against rust perforation, 2 years on liner against manufacturing defects. Customer support is available via phone and email. Users report average response times (24-48 hours). Warranty registration may be required.

Where can I buy In The Swim Oasis at the best price?

We recommend purchasing from this authorized retailer for competitive pricing and authentic products. Amazon often has stock and quick shipping. Price may fluctuate seasonally; check for coupons or bundle deals.

Can I use an Intex pump with this pool?

Yes, as long as the pump is rated for 18 ft round pools (typically 1 HP or equivalent). You’ll need to adapt the hose connections if they differ from standard 1.5-inch fittings. Many users pair Intex sand filters with Oasis pools successfully.

How long does installation typically take?

For two experienced adults, expect 6-8 hours. First-timers may need 10-12 hours spread over a weekend. Ground leveling is the most time-consuming part. Having all tools ready speeds the process.