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

Cartridge Filters – All makes and models for pools and spas

NZ Made Magnum spa and pool filter cartridges – If your cartridge filter is not listed here, please  Contact us and we will order it on your behalf.

Available in:
  • r: Waterway Top Load 45/ Signature 50 - $83.00 inc GST
  • r: Spa Quip SQ50 - $82.00 inc GST
  • r: Hotspring C30 - $39.00 inc GST
  • r: Alpine Spas / Canadian Spas - $55.00 inc GST
  • r: Galaxy Spas GX25 - $64.00 inc GST
  • r: Davey Spa Quip Series 1000 C50 - $89.00 inc GST
  • r: Alpine Spas 20 - $62.00 inc GST
  • r: Vortex Spa C24 - $62.00 inc GST
  • r: Spa International External - $79.00 inc GST
  • r: Rainbow RDC50 - $85.00 inc GST
  • r: Stoked Spas Topload 30 - $82.00 inc GST
  • r: L.A Spas 50 - $82.00 inc GST
  • r: Sensation Spas SE45 - $82.00 inc GST
  • r: Vortex C30 - $62.00 inc GST
  • r: Vortex C50 - $85.00 inc GST

SKU: N/A Category:

Product Description

Filter Request

  • List any numbers on endcap or filter housing
  • Drop files here or
    Accepted file types: jpg, png, jpeg, Max. file size: 8 MB, Max. files: 5.





    Magnum filter cartridges do not have a defined termination point, but over a period of time your cartridge will gradually block up and will need replacing.

    There are three factors in determining whether you cartridge needs replacing:

    The cartridge gets blocked quickly, and you have to clean your cartridge more often.
    Restricted water flow and high differential pressure (differential pressure is the difference between the pressure coming in and the pressure going out).
    A cracked or damaged cartridge (this is very rare, and is usually caused by incorrect installation or high differential pressure).

    In a spa or pool with very high usage you will need to change the cartridge within a year, but normally between 18 months and 2 years.


    Because a filter is designed to collect unwanted particles, debris, oils, soaps etc, it will need to be cleaned periodically. Basically the more you use your spa or pool, the more often you have to clean the filter cartridge. From very high usage (every 2-3 weeks) to low usage (every 2 months).

    A blocked cartridge can put undue pressure on your pump and motor and decrease the life of these parts.

    Please use BioGuard Filter Brite or BioGuard Spa Filter Renew to clean your filters on a regular basis.


    Additional Information

    Weight .2 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.

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