Lo-Chlor Algae Knock-Out Algaecide 2.5L - Pool Chemical (DG)

92% of 100
No.1 treatment for stubborn algae strains in pebble pools and ageing pool surfaces.
Satisfaction Guaranteed
    • Satisfaction Guarantee: If you are not satisfied with a product for any reason, you are welcome to return it to us for a full refund or exchange within 30 days of the purchase date - even if you have used the product. Returns are free, and we will cover return shipping.
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30 Days Satisfaction Guarantee

You are welcome to return any product for a refund or exchange. See terms below.


Free, Easy Returns

Returns are free, there are no fees. We also make sure returns are easy to organize and processed promptly.

Satisfaction Guarantee

We stock quality pool and spa equipment and supplies from the most renowned manufactures in Australia and the world and we are confident that you will be very pleased with your purchase. If for any reason you are not satisfied with a product, you are welcome to return it to us for a refund or exchange within 30 days of the purchase date. The refund will be issued to the full amount paid for the product including shipping.


  • You must contact us within 30 days of the date of purchase.
  • The product must be returned in good conditions.
  • Products damaged because of incorrect use, negligence or misuse will not be accepted.
  • All components, accessories and original packaging must be returned.
  • A copy of the original receipt must be included with the return.
  • Products must be shipped or returned to our Penrith NSW warehouse using a pre-paid label we will supply.

If you have any questions about our return policy, please contact us on 1300 766 619 or through our "contact us" form.

How to return a product

For more details including the steps required to return a product click here

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Originally developed for ALL types of algae, Lo-Chlor Algae Knock-Out is now widely known as the No.1 treatment for stubborn algae strains in pebble pools and ageing pool surfaces.

Features & Benefits:


  • Use in all types of pools.
  • Effective against blue-green, black spot and mustard algae.
  • A favourite for pebble surfaces and ageing pool surfaces.
  • Especially popular with salt chlorinated pool and ionised pools.
  • Quaternary ammonium base - dual action formulation.
  • The increased detergent action (foaming) assists in releasing the clinging algae crusts from pool surface.
  • For severe algae infestations use in conjunction with Lo-Chlor Black Spot 900 Algaecide
  • Remember - always test for phosphates after the addition of a Lo-Chlor Algaecide



2.5L treats 50,000 litres pool water

Additional information:

  • Product may foam and smell for up to 10 days.
  • Reduce pH to 7.2 for best results.
  • Use with Starver® Pool Maintenance for badly infested pools.
  • High doses of quaternary ammonium compound may combine with free chlorine, resulting in excess levels of combined chlorine.
  • This phenomenon lasts 2 or 3 days.
  • Addition of Lo-Chlor Aqua-Boost is recommended if condition persists.
  • When added to a pool running with a salt chlorinator the ammonia occasionally reacts with the gases produced in the salt chlorinator cell causing fine bubbles to form on the surface of the pool.
  • These bubbles will dissipate as soon as the chlorinator is switched off and usually only last 5-7 days.
More Information
Warranty1 Year
ModelAlgae Knock-Out 2.5L
Product TypePool Chemical