Click here for our autumn whopper give away!


BioGuard AlgiGuard 1l

A highly effective quat-based algaecide that lowers surface tension to help repel ducks and insects. It also works well with chlorinating products to prevent a wide variety of algae.

Available in:
  • 5 Litres - $178.00 inc GST
  • 946ml - $37.00 inc GST

Frequently Bought Together

For a sparkling, healthy pool, you may also need to add an oxidiser.

Total Price: From: $67.00

SKU: 20020079 Category: Brand:

Product Description

  • Weekly application.
  • Prevents wide spectrum of algae growth.
  • Also effective as a duck deterrent and floating/swimming insect killer.
  • Negligible effect on water balance.
  • Stable in sunlight and will not evaporate.


Traditionally, sanitisers have been used to treat and control algae but this is proving to be much less reliable as algae species become more diverse and resistant. Pool Algaecides are designed specifically to counter the defence mechanisms algae has developed to protect itself. Even if we can’t see them, algae spores are always present and when they become active, they thrive on wastes in the water and dramatically multiply in numbers. It is important to control algae in swimming pools for health, safety and aesthetic reasons. An algae-infested swimming pool is also an expensive and frustrating problem to correct.


  • 400g/L benzalkonium chloride.
  • Powerful wetting agent.

Additional Information

Weight 1.1 kg



We ship freight free for North Island orders over $169.00, and Waiheke Island and South Island orders over $269.00 (Applies only to orders under 25kg Auckland, elsewhere under 15kg.  Where applicable, RD and DG goods surcharges still apply).  Please click here for more details.


We stock quality pool and spa products and are confident that you will be very pleased with your purchase. If for any reason you are not satisfied please return it to us for a refund or exchange within 7 days of the purchase date. The refund will cover the purchase price of the returned product, including return shipping.  Please click here for more details.

You may also like…