Black Algae in Pool – What Does It Look Like and How To Get Rid Of It (2021)

You do not want to step inside a pool that is infected with green algae or black spot pool algae, as it can give rise to several skin infections.

In case you would like to make your pool look as good as new and make it free from algae infestation, go through this guide.

Here you will get genuine information regarding how to clean black algae from your pool and make it presentable.

You will also get access to frequently asked questions that will aid you in sorting out your queries.

Black algae in pool infestation

If you do not take pro-active pool maintenance measures to eliminate algae from your pool then there is a chance that it may even cause irreparable structural damage.

Of all known algal strains, black algae can cause lots of trouble and there is a chance that you’ll have to spend a hefty amount of money on repairs.

There are several vectors through which algal spores might enter your pool.

Your cuddle buddies might contain algal spores on their paws and coat.

In addition, you might even contaminate water by wearing a swimming costume that is infested with algal spores.

Techniques and tips on how to get rid of black algae

Black Algae in pool

There are several ways by which you can eventually make your pool water and pool surfaces free of black algae infection.

Some of the most common DIY tips are as follows.

1. Maintain proper pH level to avoid black algae

Algal strains thrive when they get the optimal environment; this is the reason why you should keep an eye on the pH level.

It would be wise to keep the pH level at about 7.6.

Apart from the pH-level, check on the level of chlorine level and alkalinity of the swimming pool.

2. Shock your pool with chlorine to get rid of black algae

Indeed, chlorine tablets are considered one of the best disinfectants.

You can place granulated chlorine in the pool every week. That will eventually help you to get rid of chloramines.

Chloramines degrade the water quality and help algae to thrive in your pool.

In addition to this, you can even use Potassium Peroxymonosulfate or lithium hypochlorite to shock your pool.

3. Wash swimming pool costume in case you see black spots

In case you go for a swim in a lake or ocean, then wash the swimming costume in your washing machine before entering your pool.

Algae are known to thrive in natural water reservoirs and there are chances that their spores might get hooked on to the seams of your swimming costume.

It would be wise to bleach the swimming costume with warm water.

4. Clean regularly your pool to avoid black algae

This is considered as one of the most influential tips with the help of which you can keep your pool free from any algal infestations.

There are several automated and manual cleaning instruments present on the market that will prevent any unwanted black algae growth.

For the best results, you can vacuum your swimming pool every month; this will clean all the pool surfaces evenly.

5. Make sure water circulates properly to reduce what causes black algae 

Stagnant water might allow black algae spores to grow in the corners or in the seams of floor tiles.

Thus, you are required to keep the pool water moving. That will not allow the roots of the spores to attach to any surface.

Besides, you also have to clean the filter every fifteen days as it will keep your pool clean from any black algae growth.

Correcting common problems caused by black algae

In case you are planning to clean your swimming pool infested with black algae, there are several issues that you need to take into consideration beforehand.

These pro-active measures will help you to clean the pool in an effective manner and in a relatively short time.

The size of black algae

The more black algae in your swimming pool, the harder it is to remove it.

There are several techniques that you need to employ such as chlorination (use a chlorine tablet), vacuuming, cleaning the filter, scrubbing, etc.

In case you are dealing with the problem of black algae infestation, undertake thorough vacuuming and scrubbing.

You can even undertake pro-active measures like chlorination and cleaning of filters that will prevent the roots of the spores thriving in the first place.

Concern about the water temperature and black algae treatment

You must maintain perfect water temperature while cleaning the black algae strain. The higher the temperature, the better.

If possible, you should heat the pool water to around 60 degrees Fahrenheit, this will make sure you can eliminate the algal infestation in about 24 hours.

Clean black algae fast from your pool

Try to clean the pool as soon as possible or it gets harder to eliminate the algal infection.

You need to use more than one chlorine tablet and bleaching powder to fix such a problem without much effort.

Best practices to clean black algae

If your swimming pool is highly infested with black algae then there are a few measures that you are required to undertake.

Pressure wash

You need to empty the pool with the help of an exit hose and then wash the surface with the jet stream.

This process will help you to clean the pool without even using any chemicals.

Aluminum brush

Aluminum is water-proof, so you do not have to worry about replacing it often.

You just have to scrub the surface of the pool, walls or corners with the brush. This will help you to eliminate the algal growth quickly.

In the end, you need to drain the whole pool, refill it, and make sure that the pH-level is properly balanced.

For maintenance, you can use bleaching powder that will shock your pool and won’t allow the algae to thrive in it.

Chlorine tab

To get rid of black algae from a specific part of the pool you need to place chlorine on the affected area and leave it for about 3 minutes.

In the next step, you are required to use a wired brush and scrape off the algal growth manually.

Tools you need to use

There are several tools and reagents that you can pick to eliminate black algal growth in your swimming pool.

The most common and effective ones are listed below.

Long bristled brush

Whether you have a fiberglass or above the ground pool, long bristled brushes will help you to eliminate black algal growth without much hassle.

Bleaching powder

Bleaching powder not only makes the pool acidic but it also helps to loosen the grip of the roots of the algal strain on the floor of the pool.

Thus you can easily eliminate black algal growth even in the tile seams.

Vacuum brush head

If you have a large pool or you have a lot of algal infestation, then vacuum brush heads will help you to undertake the job with perfection.

Jet stream generator

Through the help of the jet stream generator, it is easy on your part to clean the pool without using any hard chemicals.

Thus there is no fear of any discoloration of tiles due to excessive use of bleaching powder.

Frequently asked questions about black algae

How to get rid of algae in a pool?

One of the easiest ways to eliminate black algae is to add an extra dose of chlorine in the pool.

This will eventually decrease the level of acidity and algal spore won’t survive for long.

How to get rid of algae in a pool quickly?

To eliminate algal growth quickly you need to thoroughly brush the surfaces with a long bristled brush.

How to remove algae from a pool?

You can use an algaecide to eliminate algal spores from your swimming pool.

If possible, you can even vacuum your pool thoroughly with an automatic machine.

What causes algae in pools?

There are several causes due to which your pool might get infected with black algae.

One of the most common causes is that you might have a swimming costume that is infested with pores.

In addition, stagnant water in the pool might even cause algal infestations.

How to remove dead algae from the pool bottom?

The easiest way to get rid of dead algae from your pool’s bottom is to use an automatic vacuum machine.

Moreover, you can even use flocculants that cloud at the bottom, and with the help of the outlet pipe, the dead algae will get removed from the surface.

What do black algae look like?

Black algae usually grow in the corners and on the base of the swimming pool.

It is slimy to touch and has a black, spot-like appearance.

What causes black spots in pools?

Poor levels of chlorine and high concentration of phosphate lead to the infestation of algal strains and eventually black spots in the pool.

In addition to this, pets and unwashed swimming costumes also cause algal strains to thrive in your pool.

How to remove black algae from the fiberglass pool?

You require a stiff-bristled brush and 7.5 liters of premium quality bleach to get rid of black algae from the fiberglass pool.

Pour the bleach in the pool, let it settle for 24 hours, then scrub the walls, floor, and corners thoroughly with the brush.

Does chlorine kill algae?

Yes, when you use an adequate amount of chlorine as per the size of the swimming pool it will kill the algal growth.

Furthermore, chlorinated water won’t allow the algae to thrive in your pool.

How to get rid of algae in the above ground pool?

Most importantly, you are required to clean the walls of the pool and see to it that the ladder of the pool doesn’t have any green algae spores.

In addition to this, make sure to clean the corners of your pool as algae thrive in these places.

You need to use common bleach and a long-bristled brush for the cleaning purpose.

How to remove algae stains from a pool?

There are several ways to undertake this process like shocking the pool, vacuuming it, and manually brushing the corners.

You also have to test the acidity level of the pool and maintain the proper alkalinity.