Dealing with Spa Algae: Your Comprehensive Guide

Algae in your spa comes from low chlorine, unbalanced water, or bad filters. If you see algae, act fast to stop it from taking over.

There are three main kinds of algae, and each one needs a different fix.

Swimming in a spa with a little algae isn't the end of the world, but avoid it. Algae can house nasty stuff like E-coli. Always swim in a clean, well-kept spa.

Green Algae

This is the common one. It turns the water cloudy and leaves a green goo. To get rid of it, clean your spa, filter the water, and use a shock treatment.

Yellow Algae

Yellow Algae This one loves humid weather and hides in shady spots. It resists chlorine, so you'll need to clean multiple times and use a stronger shock treatment.

Black Algae

This is the tough one. It's actually bacteria and hard to kill. If you don't clean well, it comes back fast.

How to Remove Algae

Swimming in a spa with a little algae isn't the end of the world, but avoid it. Algae can house nasty stuff like E-coli. Always swim in a clean, well-kept spa.

Identify the Algae

Before you begin the removal process, identify the type of algae you're dealing with. This is important because each type of algae requires a slightly different treatment.

Drain the Spa

Remove all water from the spa to stop the algae from growing further.

Scrub the Surfaces

Use a soft brush or cloth to scrub the interior of the spa. Some type of spa cleaner can also be used to assist in the process. Make sure you reach all areas, including jets, filters, and hidden spots where algae may reside. 

Clean the Filter

If your spa has a removable filter, take it out and clean it thoroughly. If it's heavily infested with algae, you may need to replace it entirely. If it's not removable, soak it in a filter-cleaning solution

Rinse Well

Once all surfaces are scrubbed, rinse the hot tub thoroughly using a garden hose to ensure no residual cleaning chemicals remain.

Refill the Spa

Refill your hot tub with fresh water. When you do this, ensure the water goes through the filter box as it helps to disperse the sanitizers more evenly when added later.

Balance the Water

Before anything else, balance your spa water. Test the water with a test strip and make adjustments as needed to the pH, alkalinity, and chlorine levels.

Shock and Sanitise the Spa

Shock and Sanitize the Spa: Shock the water with a spa shock treatment. It will help kill any remaining algae or bacteria. Once this is done, use a sanitizer, following the product's guidelines, to keep the water clean and safe.

Regular Maintenance

Regular Maintenance: To prevent any future algae bloom, maintain regular cleaning of your spa, the filter, water balancing, and sanitizng. Also, keep the spa cover clean and expose it to sunlight often, as sunlight naturally combats algae growth.

Educate Spa Users

Ensure that everyone using the spa understands the importance of showering before entering the hot tub and not to wear clothes washed with detergent in the spa, as this can contribute to algae growth. 

Prevent Future Algae. The best cure is prevention.

Maintaining a regular spa maintenance routine can help prevent algae problems. Regularly test and adjust your water's pH, alkalinity, and chlorine levels as needed.

Keep your spa filters clean

Keep your spa filters clean and regularly immerse them in filter scrub (per your product's guidelines).

Carry out regular spa shock treatments

Once a week, especially during periods of heavy spa use, carry out a spa shock treatment. Run your spa's circulation pump according to the guidelines recommended for your specific spa model.

Sanitize all items entering the spa

Sanitise all items such as clothing, equipment, toys, etc., entering the spa. Always fill your spa through the filter box. Avoid using clothes washed in detergents or entering the spa

Summary and Recommendations

Adherence to these fundamental principles can help keep algae issues at bay. And also, these principles can aid in dealing with any algae problems that may arise. Recall that the key is to respond promptly at the initial signs of algae to prevent a major algae bloom.

Dealing with Spa Algae: FAQ

Explore our detailed FAQ section to learn about the causes, prevention, and treatment of spa algae. Ensure your spa remains clean, safe, and enjoyable.
  • What causes algae in spas?

    Algae in spas can be caused by factors such as low chlorine levels, unbalanced water chemistry, poor filtration, or lack of regular maintenance.
  • What are the different types of algae found in spas?

    The three main types of algae found in spas are green, yellow (or mustard), and black algae. Each type requires a different treatment method.
  • Is it safe to use a spa with algae?

    While swimming in a spa with a small amount of algae isn't immediately harmful, it's best to avoid it. Algae can house bacteria like E-coli and can make surfaces slippery, increasing the risk of accidents.
  • How often should I check my spa for algae?

    It's recommended to check your spa for signs of algae at least once a week. If your spa is heavily used or located outdoors, you may need to check more frequently.
  • What should I do if the algae keeps coming back?

    If algae keeps returning, it may be a sign that there's an underlying issue with your spa's water chemistry or filtration system. It's recommended to have your spa professionally inspected.
  • How can I prevent algae growth in my spa?

    Preventing algae growth involves maintaining proper water chemistry, including appropriate chlorine levels, regular cleaning of the spa and filter, and using algaecide as a preventative measure.
  • How do I treat algae in my spa?

    Treatment involves thoroughly cleaning the spa, superchlorinating the water, and using an algaecide. It's also important to clean or replace the filter after an algae outbreak.
  • What is the first step in treating spa algae?

    The first step in treating spa algae is to remove as much of the algae as possible manually. This can be done by scrubbing the spa surfaces and vacuuming the spa floor.
  • Can I use pool chemicals to treat spa algae?

    While some pool chemicals can be used in spas, it's important to use products specifically designed for spas whenever possible. Spa water is typically hotter and more concentrated than pool water, which can affect how chemicals work.
  • Is there a natural way to prevent spa algae?

    Maintaining a clean spa and balanced water chemistry is the most natural way to prevent algae. Some spa owners also find success using mineral sanitizers or enzyme-based products to help control algae.

Looking to upgrade your outdoor oasis?

Request an obligation free quotation today. Complete the form below and we'll get right back to you.

Error. Your form has not been submittedEmoji
This is what the server says:
There must be an @ at the beginning.
I will retry
Reply
  • Barrier Reef Pools
  • Australian Made Spas
  • Pool and Spa Equipment