Got Yellow Algae in Your Pool? Here’s Why

It’s a sizzling summer day, you’ve got your favorite drink in hand, and you’re ready to take a plunge into your nice, cool swimming pool. But as you approach, you notice something strange, a yellow tint in the water that makes your pool look less than inviting.

Unfortunately, you’re likely dealing with yellow algae.

Yellow algae, also known as mustard algae, can be a real party pooper. 

Unlike its green cousins, yellow algae seem to defy the usual chlorine treatment, clinging stubbornly to pool walls and making your pristine blue waters look like a long-forgotten frog pond.

If you’re curious about what yellow algae is and how to get rid of it, you’re in the right place. 

What Exactly is Yellow Algae?

Yellow algae, despite its cheery, sunshiney name, is anything but. 

Scientifically known as Chloromonas, this pesky invader prefers shady spots and can resist standard chlorine levels. Yellow algae appear as a pollen-like substance, and if left unchecked, it can spread like wildfire through your pool, turning a refreshing swim into a murky nightmare.

So what causes it?

Yellow algae thrive in warm temperatures. If you live in a sunny state like Arizona, Texas, or Florida, your pool is a prime target. The heat encourages algae growth, especially during those sizzling summer months.

Unlike other algae, yellow algae prefer shady areas. They often lurk on the pool’s walls and floor, where sunlight doesn’t penetrate as much. This makes detection tricky until it’s too late.

Unfortunately, standard chlorine levels may not be enough to deal with yellow algae. If your pool has experienced fluctuating chlorine levels due to heavy usage or a skipped maintenance routine, yellow algae may seize the opportunity to take over.

You’ll also likely find that yellow algae is an issue if your circulation is poor, since good water circulation is absolutely essential for preventing algae growth. If your pump isn’t running long enough, or your filter needs a good cleaning, then you’re practically rolling out the welcome mat for yellow algae.

The final risk factor? Cross-contamination. Swimsuits, pool toys, pets, and even the pool equipment from another pool can introduce yellow algae spores. Always rinse these items before they enter your pool to minimize the risk.

How to Send Yellow Algae Packing

Now that you know what yellow algae is and what causes it, how do you get rid of it? Here are some tips: 

Step 1: Brush it Off

The first step in your yellow algae eviction mission is a good old scrub. Grab a brush suitable for your pool surface and vigorously scrub the walls and floor. This disrupts the algae’s hold, making it easier for chemicals to do their job.

Step 2: Shock and Awe

Next, hit the algae with a shock treatment. Use a high-quality pool shock and follow the instructions to the letter. You’ll want to raise the chlorine level significantly to break through the algae’s defenses. Be generous with the shock – yellow algae don’t go down easy.

Step 3: Keep it Circulating

Run your pool pump continuously for at least 24 hours after shocking. This ensures that the treated water reaches every nook and cranny. Clean or backwash your filter afterward to remove any dead algae particles.

Step 4: Algaecide Attack

Follow up the shock treatment with a mustard algaecide. These specialized formulas are designed to target yellow algae effectively. Add the algaecide according to the packaging and continue running your pump for another 24 hours.

Step 5: Balance and Maintain

Once you’ve given the algae the boot, it’s time to balance your pool’s chemistry. Check the pH, alkalinity, and calcium hardness levels to make sure everything is in harmony. Regular testing and adjustments will keep yellow algae from making a comeback.

Prevention is the Best Cure

To keep yellow algae at bay and prevent it from becoming a problem in the future, you need to establish a consistent maintenance routine. 

Here are a few tips to keep your pool crystal clear:

• Regular Brushing and Vacuuming: Make it a habit to brush your pool walls weekly and vacuum the floor to remove any spores before they settle.
• Maintain Proper Chlorine Levels: Test your chlorine levels regularly, especially after a pool party or heavy rainfall, and adjust as needed.
• Provide Good Circulation: Run your pump for at least 8-12 hours each day. This ensures that all areas of the pool receive proper filtration and chemical distribution.
• Shock on Schedule: Make shocking the pool part of your maintenance routine, especially during the hotter months or after heavy pool usage.
• Rinse Pool Gear: Rinse swimsuits, pool toys, and equipment before introducing them to your pool. It’s a small step that can prevent a big problem.

When Is It Time to Call the Pros?

If, despite your best efforts, yellow algae still haunt your pool, it might be time to call in the experts. 

At Amenity Pool Services, we’ve spent over 50 years perfecting the art of pool care. Whether you’re in Phoenix, Tucson, Dallas/Ft Worth, Miami, Orlando, or Jacksonville, our team can help restore your pool to its former glory.

Ready to say goodbye to yellow algae for good? Reach out to Amenity Pool Services today and experience the peace of mind that comes with pristine, algae-free waters. Contact us now!