In The Swim Basic Pool Closing Kit and Shock Bundle - Winter

Our review of the In The Swim Basic Pool Closing Kit and Shock Bundle finds it best suited for pool owners who want a low-effort, effective winterizing routine for pools up to the stated capacity. The kit's single biggest selling point is the combination of a chlorine-free closing system with six pre-measured 1 lb bags of calcium hypochlorite shock, which together make closing straightforward while reducing the chance of algae, stains, and equipment damage during the off-season. For users who value a clean spring opening without heavy spring shock work, this bundle delivers tangible peace of mind.

Key Features

• Complete winter protection: The chlorine-free closing kit stabilizes the pool through the offseason to help prevent algae growth, staining, and equipment issues.
• Added sanitizing power: Six pre-measured 1 lb bags of cal hypo shock eliminate bacteria and organic waste before closing for a cleaner spring start.
• Algae defense: A non-chlorine winter floater controls carbon dioxide levels, making conditions less favorable for algae without harming chlorine-sensitive surfaces.
• Stain and scale prevention: The included liquid metal control helps neutralize minerals that can cause scale buildup or metal staining on liners and equipment.
• Designed for easy reopening: By reducing organic load and mineral staining, the kit minimizes the need for costly spring cleanup or heavy shock treatments.

Who It's For

This bundle is ideal for above ground and in-ground pool owners who prefer a simple, pre-measured approach to winterizing and who want to avoid labor-intensive spring remediation. It works well for those with vinyl liners or other chlorine-sensitive surfaces because the closing system is chlorine-free while still providing algae control.

Those with very large commercial pools or pools with extreme mineral issues should consider a professional winterization plan or additional specialty treatments, since this consumer kit is optimized for routine residential care and the product guidance centers on pools up to the capacity implied by the bundle.

Pros & Cons

Pros

• Easy to use with pre-measured shock bags that simplify dosing and reduce guesswork.
• Effective algae control from the non-chlorine floater helps protect chlorine-sensitive surfaces like vinyl liners.
• Liquid metal control reduces the risk of staining and scale, protecting equipment over the winter.

Cons

• One limitation is that larger or heavily contaminated pools may need supplemental treatment beyond the included materials.

Specifications

Product type	Pool closing kit with cal-hypo shock
Sanitizer included	6 x 1 lb bags of calcium hypochlorite shock
Chlorine-free closer	Yes (non-chlorine winter floater)
Additional additive	Liquid metal control for stain and scale prevention
Intended pools	Above ground and in-ground pools
Seasonal use	Winterizing (offseason protection)

Our Verdict

The In The Swim Basic Pool Closing Kit and Shock Bundle is a practical choice for residential pool owners who want a low-effort winterizing routine that leaves them with a clean, manageable spring opening. It pairs a chlorine-free closing system with pre-measured cal-hypo shock and stain control to protect water clarity and equipment, offering solid value for routine winter protection.

Frequently Asked Questions

Can this kit be used on vinyl liners?
Yes, the chlorine-free winter floater is formulated to be safe for chlorine-sensitive surfaces such as vinyl liners.

How many shock bags are included?
The bundle includes six pre-measured 1 lb bags of calcium hypochlorite shock for sanitizing before closing.

Will this prevent staining and scale?
The kit includes a liquid metal control additive designed to neutralize minerals that can cause staining and scale, helping protect surfaces and equipment.