Hot Tub Supply Spa Depot
Hot Tub Spa Filters
Cleaning & Maintenance
  SpaCyclopedia Index Filtration Systems Video Filter Replacement Guide
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 annually.

Rotate Your Spa Filters

Hot tub filter rotation 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 Power Soak or Eco Soak.  Then rinsed again and allowed to dry out.

Filter cleaning

Grime Blaster

The Grime Blaster is a handy filter cleaning tool. Use with EcoSpray filter cleaner.

Automatic Filter Cartridge Cleaning Blaster 1000 Automatic Filter Cleaner

Now there's an easy, thorough method for cleaning filters: the Blaster Automatic Filter Cleaner. It slowly rotates the filter under water power while deeply spray-cleaning the pleats. Splash-back, common with other devices, is not a problem with this design.

View the video demonstration

Blaster demonstration movie
garden hose connectionEcoSpray Instant Filter Cleaning Spray Just connect the Blaster 1000 to a garden hose, treat filter cartridge with EcoSpray instant filter cleaner, then place the cartridge on the unit and turn on the water. It does all of the work for you.

We've tested and used various units over the years, and this one is the most impressively engineered and effective hot tub filter cleaner that we've seen.

Removal of Scale Buildup

Acid 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.


  • 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 annually.

  • 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.

  • Find filters for your spa fast in our Filter Replacement Guide and keep a spare on hand.

Avoid bleach Bleach is bad for filters
Although household bleach may seem to do an adequate job of cleaning, it degrades and weakens the fibers in the filter media, greatly decreasing spa filter life expectancy.


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


spa customers write  Consumer Reviews
Blaster 1000 Filter Cleaner
"This thing really deep cleans!  I wish I had one years ago. Great price by the way!"

Mark Welsh
Tumwater, WA

Spa Depot, The, Spas & Hot Tubs - Dealers, Olympia, WA

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