Why Does My Salt Water Pool Keep Turning Green?

Imagine this: One morning you’re having a pool party. You have invited all your friends and colleagues, probably have a barbeque set up next to the pool, umbrellas drawn and chairs set.

You are most probably having a great time and enjoying yourself like there is no tomorrow.

Why does my salt water pool keep turning green


But alas! There always a tomorrow. But that tomorrow of yours won’t go as smoothly as you would have wanted it to.

The next morning when you wake up from the hangover take a stroll outside the house to clean up the mess left after the party, what do you see?

Your salt pool water has changed its color to a bright green hue and doesn’t look as good as it was looking just one day before.


salt water pool keeps turning green

What are algae?

Now, the question you might ask yourself is, why is my pool water green?

The short answer to that is Algae.

Now, you might wonder what is an Algae exactly? An Algae is a kind of single-cell organism that is capable of photosynthesis.

And rather than any 200ft tall algae that also exists somehow, yours is most probably a microscopic variant.

And if you’re curiosity still pokes you, you might also ask, Why Green?

The reason for that is that they contain green pigment chlorophyll. That’s why it’s green.

In actuality, green algae are the most common of their kind but they can grow very fast and can change the color of your pool seemingly overnight. But luckily, this is also the easiest to remove.


Read: How To Remove Yellow Algae Stains From Pool Walls?


Where Did it Come From?

Now moving on to some actually serious topics, how did algae end up in your pool and how exactly you could have prevented it, and how to clean this mess up in the present.

The Algae could have come from many different places. It could have come through air or rain. In this case alone, nature is your worst enemy.

The water that vaporizes takes up the algae along with it. And the algae come down with the rain which contaminates your pool’s water.

The same goes for air too as it can easily blow algae and bacteria into the pool. The best way to protect the pool water from such contamination is to use a pool cover while it’s not in use.

But there can always be mishaps. So, stick to the end to find out how to remove the algae afterward.

Another key reason of algae contamination can be the guests you might have brought. It’s nobody’s fault, but the unclean swimsuits can carry algae which can then be mixed with the pool water and pollute the water.

Once the algae spores get into the water, they mix quite fast creating a mess for the owner to resolve.

And last but not least is your pool’s water itself. If the pool water is not in a balanced condition, it can quickly be affected by the algae, germs, and bacteria. This can pollute your pool and be very damaging to the pool interior and those who might try to enjoy a dip or two.


Read: How Do You Clean A Green Pool in 24 Hours


A few key notes

There is a few more things to keep in mind if you want to keep your pool clean and safe from any kind of algae infestation.

The Salt chlorine level in your pool is what keeps the algae and bacteria from ever doing any real harm. So, always keep the Chlorine level in check.

Direct sunlight can break down chlorine faster, giving way to a major algae outbreak. So, as mentioned above, “Nature is your worst enemy”, and you should always use a cover to protect the pool from direct sunlight whenever possible.

High temperatures can also damage your pool’s saltwater as it accelerates the growth of algae.

So, even though it is impossible keep your pool water cool all the time, what you can do is to drain the water when it’s not in use to stop it from ever having a chance of such growth.


How To Stop Algae?

The best way to stop an algae infestation is to never let it happen in the first place. There is plenty of ways to do that.

  • Use a Pool Cover. Always use a pool cover whenever the pool is not in use.
  • Use water test tool kit to test your pool water on a regular basis. The water can get contaminated fast and seemingly instantly. So, it’s best to keep track of the water quality on a regular basis so that the disease can be stopped at the root.
  • Use high quality water filter to clean your water promptly. Fitting an average grade cleaner might get the job done in colder seasons, but it won’t be able to handle the sheer growth of algae during the sunny season. So, it is best to use an industrial grade water cleaner to maintain the pool water.
  • But sometimes filters can’t do everything. Just like real life, filters may sometimes fail to accomplish something that could’ve been done just by a little manual labor. Clean the pool with brush and vacuum whenever you see any early sign of algae. That way the infestation will be stopped at the source.
  • Use a Salt Chlorine Generator to keep your pool’s water balanced at all times. The generator will notify you whenever the chlorine level is fluctuating.


How To Remove Existing Algae?

Let’s say that somehow you failed to do all of the above steps, or that lady luck has left your side and now you have a Green Algae infestation in your pool. There are several ways to remove it from your pool.

1. Use a Pool Brush to scrub away the algae.

2. Use a Pool Vacuum to suck up app the algae cleaning the pool instantly.

3. Use a Pool water test kit for good measure.

There are many kinds of algicides available in the market. Use any one of them to get rid of the algae. P.S. use only the best quality products to do so to stop any further harm for the pool-goers.

It’s also very important to use all kind of protecting gear such as Hand Gloves and safety glasses and face masks to protect from any harm that may come your way.

But it is always advisable to call a professional and ask for their help. Not all tasks have to be DIY.

So, If you’re not sure how to clean your pool or just not feeling confident enough, always call a professional and let them do their work.

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