Spa filter cleaner vs DIY soaks (TSP, dishwasher detergent, vinegar, bleach)
By MySpaFilter Editorial Team · Last reviewed
Unicel and Pleatco approve three soaks: a commercial filter cleaner, 1 cup TSP per 5 gallons, or 1 cup dishwasher detergent per 5 gallons[4][1]. Jacuzzi prefers commercial non-foaming cleaners, allows a 1:3 white vinegar solution for light mineral scale, and says to avoid chlorine bleach, harsh degreasers, bathroom cleaners and abrasive powders[10].
Comparison
| Option | What sources say |
|---|---|
| Commercial spa filter cleaner | Approved by Unicel/Pleatco[4][1]; Jacuzzi’s preferred choice[10]; Hot Spring recommends a filter degreaser[9] |
| Trisodium phosphate (TSP) | 1 cup per 5 gallons, soak ≥1 hour[4][1] |
| Dishwasher detergent | 1 cup per 5 gallons[4][1]; Jacuzzi warns detergents can foam if not rinsed extremely well[10] |
| White vinegar | 1 part to 3 parts water for light mineral scale; weak on oils[10] |
| Chlorine bleach | Avoid — can damage fibers[10]; Pleatco says bleaching agents can damage filtration fabric[3] |
| Muriatic acid | Only for confirmed mineral scale, after degreasing — see guide |
Special cases
- Biguanide (Baquacil) users: Unicel and Pleatco say the cartridge must be cleaned with Baqua Clean before any cartridge cleaner[4][1].
- Disposable inserts: Sundance says never use filter cleaners on its inner inserts[11].
- Tablets: Pleatco FilterWash is meant for a 25–30 minute soak and the solution should not be saved[3].
Always rinse thoroughly before reinstalling. Need a fresh cartridge instead? Find yours.
FAQ
Can I use bleach on a hot tub filter?
Jacuzzi says to avoid chlorine bleach, and Pleatco says bleaching agents can damage filtration fabric.
Is dishwasher detergent safe for spa filters?
Unicel and Pleatco list 1 cup per 5 gallons of water as an option; rinse very thoroughly because detergent residue can foam.
Does vinegar clean a hot tub filter?
Jacuzzi says a 1:3 vinegar solution helps with light mineral deposits but is less effective on oils and sunscreen.
Sources
- Pleatco Catalog & Cross Reference Guide — filter care FAQ
- Pleatco FilterWash information sheet
- Unicel — Maintenance & FAQ
- Hot Spring Hot Spot Collection Owner’s Manual (2026)
- Jacuzzi — Hot Tub Filter Cleaning Made Easy
- Sundance Spas 680 Series Owner’s Manual (2024)
This guide summarizes published manufacturer guidance; always follow your own spa’s owner’s manual. See our disclaimer.