Wild winter give away – FREE Crystal Clear Clarifier on orders over $80.00.


$92.00 inc GST

BioGuard MSA Extreme 946ml

A patented, non-staining, highly concentrated copper-based algaecide powerful enough to kill all types of algae in swimming pools. It is formulated to prevent instances of ‘green hair’, water discolouration and pool surface staining so often encountered with copper-based algaecides.

Don't forget to oxidise your pool!

Add a 3 pack of Burnout Extreme and save $29.40

Total Price: $92.00

SKU: 20023221 Categories: , Brand:

Product Description


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 defense 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.


  • Newly improved product has been formulated to increase the hold of copper in pool water, for more effective algae control.
  • Copper polyacrylate complex-based algaecide.
  • With added flocculants and clarifiers.

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.