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GPC Winter Covers 24' Green/Black Unbound Round Diamond AG Winter Cover for 21' Round Pool
GPC Winter Covers 24' Green/Black Unbound Round Diamond AG Winter Cover for 21' Round Pool
A durable and weather-resistant above-ground winter cover designed to protect your 21’ round pool from debris, harsh weather, and algae growth.
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Feel confident in your pool’s winter protection with this unbound round above-ground winter cover, designed for maximum durability and cold weather resistance.
The tightly woven material minimizes water seepage and prevents debris from entering your pool, ensuring cleaner water when reopening in the spring.
A reinforced perimeter and secure fit help keep the cover in place during strong winds and heavy snowfall.
The green and black design reduces sunlight penetration, helping to prevent algae growth throughout the off-season.
Made for 21’ round pools, this cover offers a precise fit with an easy installation process that saves time and effort.

⭐⭐⭐⭐⭐
Customers love the cover’s durable construction and ability to withstand harsh winter conditions.
Many appreciate how it effectively keeps out leaves and debris, making spring pool opening much easier.
Users highlight the easy installation process, noting that it fits snugly without constant adjustments.
The algae-blocking design is a favorite feature, ensuring cleaner water when reopening the pool.
Reviewers also praise its value, offering long-lasting protection at a competitive price.

- Heavy-duty material – Cold-resistant, long-lasting fabric ensures durability.
- Debris protection – Blocks leaves, dirt, and contaminants from entering the pool.
- Tight weave design – Reduces water seepage and enhances coverage.
- Reinforced perimeter – Strong edges prevent tearing and add extra security.
- Wind-resistant fit – Stays in place even during harsh weather conditions.
- Algae prevention – Dark-colored underside limits sunlight exposure.
- Easy installation – Simple setup for quick and hassle-free covering.

- Size: Fits 21' round above-ground pools
- Color: Green top, black underside
- Material: Heavy-duty polyethylene
- UV Protection: Yes
- Weather Resistance: Cold, wind, and snow-resistant
- Installation: Unbound design for flexible and easy application

Is this winter cover strong enough for heavy snowfall?
Yes, the heavy-duty material and reinforced edges help withstand snow and ice buildup, keeping your pool protected all winter.
Does this cover help prevent algae growth?
Yes, the black underside reduces sunlight penetration, making it harder for algae to develop during the off-season.
How do I secure the cover to my pool?
This cover is designed to fit snugly over a 21’ round pool and can be secured with a cable and winch (sold separately) for added stability.


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GPC specializes in durable above-ground and in-ground winter pool covers designed to protect your pool during the off-season. Built for strength and reliability, GPC covers help prevent debris buildup, reduce algae growth, and make spring pool openings easier. At AquaDoc, we offer a selection of GPC winter pool covers to help safeguard your pool all winter long.
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