How to Prevent Algae Growth Using a Mesh Swimming Pool Cover

Get the safety of a mesh pool cover and the light-blocking help of a floating solar blanket so your spring opening is cleaner and easier.

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A Solar Cover below a Mesh Safety Cover reduces algae

A floating bubble cover under your mesh safety cover helps block additional sunlight that can feed algae growth.

The spring opening problem

Why Algae Shows Up Under Some Mesh Covers

Many pool owners want the ultimate safety and protection provided by using a mesh safety pool cover and also want the light-blocking, algae-dampening properties of a solid vinyl pool cover. If sunlight is allowed to penetrate through a mesh safety cover, there may be a direct link to the development of algae growth. This can happen on older mesh covers that have worn out to the point where the polypropylene threads are no longer tightly woven.

When you open your pool for the swimming season and the water is green or heavily stained from sunlight penetration through the cover, it can take days or even weeks to bring water conditions back to where you want them. The goal is to keep safety high while reducing that spring cleanup burden.

Algae prevention method

The Proven Two-Layer Method

Use the safety mesh cover as the protective top layer, then add a floating solar blanket underneath to cut down the light that feeds algae growth.

We received this idea from a customer in Ohio during the 2001 pool season. He and others in his area had already been using this system for years. It is a practical way to keep your swimming pool not only totally safe, but also exceptionally clean.

To get the best of both worlds, place a solar blanket (commonly called a bubble cover) on the pool first and let it float. Then attach your mesh cover over it, just like you would normally install any safety mesh or solid pool cover.

The safety mesh cover blocks most light, and the economical bubble cover helps block much of what remains. The mesh safety cover is suspended above the pool, still keeps leaves and smaller debris out, and still provides safety protection for small children and animals. It is a big win for pool owners who want safety and cleaner spring openings.

1

Float the solar blanket

Let the bubble cover sit directly on the water to block extra sunlight.

2

Install the mesh safety cover

Anchor the mesh cover normally so the pool stays protected for safety.

3

Reduce spring algae cleanup

The second light-blocking layer helps keep openings cleaner.

Need the floating bubble cover?

We do not sell solar bubble covers, and we are not specifically endorsing these brands. They are easy to buy online: choose the size closest to your pool, and if the best match is slightly larger, trim it to fit your pool shape. As an Amazon Associate, we earn from qualifying purchases.

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Cover comparison

Solid vs. Mesh: Main Advantages

Solid Cover Pros

  • Solid pool covers virtually stop all light from entering the pool.

Mesh Cover Pros

  • Mesh pool covers weigh about half as much as comparable solid covers.
  • Mesh covers are often about half the price of many solid covers.
  • Mesh pool covers are considered a true safety cover option.
  • Mesh covers can last at least twice as long as many solid covers.
  • Mesh covers are not easily damaged by the sun's UV rays.
  • You can still block more light by adding a solar blanket underneath.

Next steps

Need Help Choosing the Right Cover Strategy?

Cleaner Openings

Reduce algae risk and spring cleanup time by limiting sunlight exposure.

Safety First

Keep ASTM-focused safety mesh protection in place over the pool.

Cover Guidance

Our team can help match your pool with the right mesh and accessory setup.

Fast Quote Path

Start online pricing and compare options.

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