6 Tips to cleaner spa filters

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Nothing is more important for hot tub water quality than your filtering system.  A dirty and clogged or worn-out filter will fail its job of trapping contaminants, and put strain on your spa’s pump. Clean your filters with every water change and replace them as needed, we recommend every 2 to 3 years.C-6430 filter

Rotate Your Spa Filters

Use the filter rotation method– while cleaning your dirty filter, swap it with a clean dry spare. With this system you’ll never have to wait to use your spa, and your filters will last longer. Allowing filters to dry completely after cleaning will help destroy any resident microorganisms.

Manual Cleaning

Spa filter cartridges should be rinsed every two weeks (more often when the bather load is heavy). Use a garden hose, and apply the water stream at a 45-degree angle, making sure to dislodge all foreign matter by spraying between each pleat.

At least every 3 to 4 months, and with EVERY water change, your cartridge should first be pre-rinsed with the garden hose, then soaked overnight (or according to package instructions) in a non-foaming filter cleaning compound such as  Bear Strip  or  Klean It.  Then rinsed again and allowed to dry out.

Removal of Scale BuildupAcid Magic

If calcium scale buildup on filter cartridges is an issue with your source water,  Acid Magic is an excellent Muriatic acid replacement.  It  is equally effective in removing calcium deposits, but much safer to use than Muriatic and easier on filter media.

First clean filter as described above, rinse, then soak the cartridge in a solution of one part Acid Magic to twenty parts water until all bubbling stops. Presto! Scale is gone! Read and observe all safety precautions and bottle instructions.

6 Tips to cleaner spa filters:

Avoid laundry detergents and household cleaners– you may have a major foaming problem with your hot tub if you use them.

Use a product designed for cleaning pleated filter cartridges.

When cleaning, always rotate out your filters with a clean, dry spare.

We recommend that filters be replaced every 2 to 3 years.

Never use a power-washer or dishwasher to clean filter cartridges. The high water pressure will damage the media. Be gentle if you use a brush.

Always follow your equipment manufacturer’s instructions for removing and reinstalling filter cartridges.

Scumbug oil absorbing spongeKeep your spa’s filter cartridges clean longer by using the Earth-friendly Scumbug oil scum absorber.  It wicks-up contaminants & works with your filter to help provide crystal clear water.


If you have more questions on how to clean your filter cartridges or need help finding the right cartridge for your hot tub click here.