How to Clean and Maintain Your Hot Tub Filter

Tools and supplies

• Garden hose with spray nozzle. A narrow spray stream helps flush debris from deep filter pleats.
• Hot tub filter cleaner. Use a spa-safe formula made for cartridge media so oils and residue break down effectively.
• Bucket for soaking. A dedicated soak container keeps cleaner contact even across the full cartridge.

Cleaning instructions

1. Shut the spa down using the disconnect or breaker procedure in its manual. Confirm circulation has stopped before opening the filter compartment.
2. Remove filter cartridges and inspect for damage. Replace cracked end caps or torn media before they affect circulation.
3. Rinse pleats thoroughly from top to bottom. Use ordinary hose pressure rather than a pressure washer, which can damage filter media.
4. Soak in filter cleaner based on label directions. Proper soak time dissolves body oils and film that hosing alone leaves behind.
5. Rinse again before reinstalling filters. A final rinse removes cleaner residue so it does not re-enter your hot tub water.

How often to clean hot tub filters

• Start with the manual's interval. A weekly inspection and rinse is a practical baseline for many pleated cartridges, with more frequent care after heavy use or windblown debris.
• Use a chemical soak only at the interval and with the product approved for the filter material. Specialty and reusable media can require a different process.
• There is no dependable replacement age for every cartridge. Inspect condition and flow, and compare against the manufacturer's model-specific guidance.

When to replace hot tub filter cartridges

Replace filters when pleats stay dirty after cleaning, the media is frayed, or flow issues return quickly.