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Writer's pictureAlgaefree Australia Team

Pool Flocculant: All You Need to Know

Updated: Oct 2




Maintaining a pristine swimming pool is no small feat, especially when encountering murky water that refuses to clear up despite your best efforts. One of the most effective solutions for this issue is a pool flocculant.


In this article, we'll explore the essentials of pool flocculant, how it functions, and pivotal details for its proper usage. So, grab your togs and get ready to become a pool maestro.


What Is Pool Flocculant?

A pool flocculant is a chemical agent specifically designed to clear up cloudy pool water by clumping together the tiny particles suspended in the water, making them easier to remove.


Flocculants cause particles to settle at the bottom of the pool or float depending on their composition so you can easily vacuum or scoop them away.


Typically, flocculants come in liquid or powder form, and their primary purpose is to deliver crystal-clear water, free from impurities.


Pool & Spa Flocculant Potable
Pool & Spa Flocculant Potable

What Does a Pool Flocculant Do and How Does it Work?

Pool flocculant works by binding the microscopic particles in the water that are too fine for the pool filter to catch. These particles might include algae, dirt, or other contaminants.


The flocculant causes these particles to form larger clumps, which then settle on the pool's floor. Once settled, these clumps can be vacuumed up, effectively removing the contaminants from the pool.


The chemical process involved typically includes the neutralisation of the electrical charge on the particles, enabling them to come together and form larger aggregates. The result? A sparkling clean pool that invites you to dive in.


When Should I Use Flocculant in the Pool?

Flocculants should be utilised in situations where the pool water is visibly cloudy, and standard pool maintenance techniques—such as filtration and shocking—have failed to clear it up.


This murkiness often stems from tiny particles that are just too small for regular filters to handle. After a period of heavy use or after a storm, for example, you might find that a flocculant is necessary to restore the clarity of your pool water.


Good Quality Flocculants can also be used to remove tannins from water or as a sand filter aid. After a sand filter has been backwashed it becomes less efficient so the addition of a good quality flocculant will boost the filter performance.


How Much Pool Flocculant Should I Use?

Determining the right amount of flocculant can be tricky, as overuse can lead to complications, whereas underuse might not solve the issue.


Refer to the manufacturer's guidelines on the specific product you are using, as the recommended dosage can vary. Generally, one litre of flocculant is sufficient for a standard-sized home pool, but always double-check to avoid mishaps.


Can I use a Flocculant with a Tank or Potable Water?

Many swimming pool flocculants contain aluminium and are unsuitable. Only Algaefree Australia make a Potable Pool and Spa flocculant suitable for use with drinking water.


What Is the Difference Between a Clarifier and a Flocculant?

While both flocculants and clarifiers aim to clear pool water, generally Clarifiers are of a weaker strength solution that contains less active ingredients when compared to flocculants. Another distinction is the type of flocculant used and the way it works.


When to Use a Clarifier Instead of Flocculants

If your pool water is slightly cloudy but not severely murky, a clarifier may be a cheaper option. Clarifiers are less aggressive than flocculants and are often less labour-intensive since they depend on your pool's filtration system to remove the particles.


Therefore, they are ideal for minor cloudiness that can be handled without additional sweeping or vacuuming.


Steps on How to Use Pool Flocculant


  • Check pH Levels

    Ensure your pool's pH level is balanced, ideally between 7.2 and 7.6.


  • Dilute Flocculant

    If your product requires dilution, mix the specified amount of flocculant with water in a bucket.


  • Distribute Evenly

    Pour the diluted flocculant evenly around the pool's edges.


  • Circulate the Water

    Turn on the pool pump and circulate the water for a couple of hours.


  • Turn Off Pump

    Allow the pool to sit undisturbed for 8-12 hours so the clumped particles can settle at the pool's bottom.


  • Vacuum Debris

    Using a pool vacuum, carefully remove the sediment collected at the bottom.


  • Backwash Filter

    Backwash the filter to remove all debris and recharge the filter using a flocculant as a filter aid as per directions.


How to Get Flocculant Out of Pool Without a Pool Vacuum

If you don't have a vacuum, fear not—there are still ways to clear the flocculant debris.


Use a Pool Rake

Gently drag a fine mesh pool rake along the bottom to collect clumps of debris.


Manual Removal

Manually scoop out the clumps using a pool skimmer net.


Filter Assistance

Turn the pool pump back on, setting it to waste, if possible, to help capture smaller residues that might remain suspended.


At Algaefree Australia, we specialise in keeping your pool in immaculate condition by leveraging the latest in pool maintenance technology, including flocculants. For professional advice and premium products, contact us today.


Check out our full range of water treatment products here.


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