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The filter is one of the most important parts of a SPA hot tub. It retains dirt, hair, skin particles and cosmetic residues, so the water remains clear, and the pumps and the heater work without additional load. A clean filter also helps use less water maintenance chemicals. Read more
How do SPA filters work? Most hot tubs use cartridge filters. Water flows through pleated filter media, which traps small particles. The pleats increase the filtration area, so the filter collects a lot of dirt and remains effective for a long time.
How to choose the right filter? Filters are not universal: they differ in size, connections, and filtration area. Choose the right filter according to the hot tub manufacturer and model, which you will find in the user manual or on the hot tub. If you are unsure, send us the model name or a photo of the old filter, and we will help choose one.
When to clean and replace the filter? The filter needs to be rinsed regularly and periodically cleaned with a special filter cleaning product. Over time the filter media wears out and no longer traps dirt as well, so the filter needs to be replaced with a new one. The exact intervals are specified by the hot tub manufacturer, and they also depend on how often the hot tub is used. It is convenient to have a spare filter: while one dries after cleaning, the hot tub runs with the other.
Important: do not use the hot tub without a filter. Unfiltered water gets dirty faster, and dirt can damage pumps and the heater.
Information last checked 2026-11-10
