Why Your Pool Keeps Growing Algae (And How to Stop It)

No one wants to jump into a green, slimy pool. But if algae keeps showing up in your swimming pool—even after cleaning—it’s a sign that something’s off with your pool maintenance routine.

Let’s break down the most common reasons why algae grows in pools, how to prevent it, and when it’s time to call in a professional swimming pool cleaning service like Ace Pool & Spa.

What Is Algae, and Why Is It in My Pool?

Algae is a living organism that thrives in warm, stagnant water, especially when chlorine levels are low or water circulation is poor. It can appear green, yellow, or even black, and it spreads fast once it starts.

Top Reasons Your Pool Is Growing Algae

1. Low Chlorine or Sanitizer Levels

Your pool’s first defense against algae is proper sanitation. When chlorine drops too low, algae has a chance to grow. Hot days, heavy rain, and high swimmer traffic can all throw off your chemical balance.

2. Poor Circulation or Filtration

If your pool pump isn’t running long enough, or your filter is dirty or clogged, water stays still—creating the perfect environment for algae to bloom. This is why ongoing swimming pool maintenance is so essential.

3. Neglected Pool Maintenance

If you don’t vacuum regularly, brush the walls, or clean your filter, you’re giving algae more places to cling and grow. Consistent pool cleaning and proper chemical balance are key to prevention.

4. Warm Weather + Debris

Leaves, dirt, and organic matter in the water act like fertilizer for algae, especially in hot and humid climates like those we see in Tennessee. It’s why many local homeowners rely on trusted pool service companies to help stay on top of regular cleanings.

When to Call Ace Pool & Spa

If algae keeps coming back, or you’re tired of battling it week after week, it’s time to call Ace Pool & Spa, your trusted professional pool cleaning service in the Nashville area.

We specialize in clearing up algae fast and keeping it gone with our reliable weekly pool service. Our expert pool technicians will handle chemical balancing, filter cleaning, brushing, vacuuming, and equipment checks so you don’t have to.

So whether you're searching for a dependable weekly pool cleaning company or just need one-time help, we’ve got your back.