When can I swim again?

15 minutes after dosing once circulation has run a full turnover.

No. MPS oxidises organics but does not kill bacteria or algae. Run alongside a chlorine bank, not as a replacement.

Weekly for a typical domestic pool, twice a week in commercial or heavy-use pools.

1 kg, 5 kg and 25 kg tubs. Sealed sachets available for plant rooms.

Can I use it instead of chlorine?

No. MPS does not sanitise. You still need a chlorine or bromine bank.

Will it bleach swimming costumes?

Less than chlorine, but extended contact will oxidise dyes. Rinse costumes after use.

What is the active ingredient?

Potassium peroxymonosulphate (MPS) at 47% active oxygen.

MPS contains potassium bisulphate as the buffer, which dissolves slightly acidic.

Does it interfere with chlorine tests?

Yes. MPS reads as combined chlorine on standard DPD kits for 24-48 hours after dosing.

Combined chlorine not dropping?

Add a chlorine shock; MPS alone will not break heavy chloramine load.

False total chlorine reading?

Wait 48 hours or use an MPS-resistant DPD test kit.

MPS vs chlorine shock?

Chlorine kills bacteria and algae; MPS oxidises organic load. Use both as a routine: MPS weekly, chlorine for algae or biofilm.

Same family. MPS (peroxymonosulphate) is the pool standard; sodium persulphate is a different product used in soil and groundwater.

Pool Non-Chlorine Shock - Potassium Monopersulphate Oxidiser

Name: Pool Non-Chlorine Shock - Potassium Monopersulphate Oxidiser
Brand: ClearSpa
SKU: psh-2
Availability: InStock
Rating: 4.5 (6 reviews)

Non-chlorine pool shock based on potassium peroxymonosulphate (MPS). Oxidises sweat, sun cream and organic load without raising chlorine, so swimmers are back in the pool within 15 minutes.

Oxidises chloramines and organic contaminants without adding chlorine.
Lets bathers re-enter the pool 15 minutes after dosing.
Cuts the strong chlorine smell at the water surface.
Restores active free chlorine by breaking down combined chlorine.
Adds zero cyanuric acid and no calcium.