Expert Verified Updated: March 2026

Non-Chlorine MPS Shock Calculator

Burn off organics without the wait. Calculate your Potassium Monopersulfate (MPS) dose for clear, sparkling water and immediate swimming.

Quick Conclusion
To burn off "Combined Chlorine" (chloramines) or organics, use 1 lb of MPS per 10,000 gallons. You can swim as soon as 15 minutes after application. Note: MPS oxidizes but does NOT kill algae.

Technical Comparison

Feature Non-Chlorine (MPS) Chlorine Shock
Swimmable 15 Minutes 4 - 24 Hours
Algae Killer No Yes
Smell Odorless Strong Bleach

Actionable Steps

Pro-Tip

The "False CC" Fix: If you use MPS regularly and see high Combined Chlorine (CC) on your test, don't panic. Use an MPS re-agent (like Taylor R-0867) to neutralize the MPS before testing for CC, or just wait 24 hours for the MPS to dissipate.

Frequently Asked Questions

Does it kill algae?

No, it is an oxidizer, not a sanitizer.

Related Tools

Sanitization

Cal-Hypo Pool Shock Calculator

Quick, powerful, and effective. Calculate the exact number of bags needed to...
Sanitization

Cyanuric Acid (Stabilizer) Calculator

Protect your chlorine from UV degradation. Calculate the exact amount of CYA...
Sanitization

Dichlor Pool Shock Calculator

Fast-acting and stabilized. Calculate the exact dose needed for a quick...
Sanitization

Trichlor Pool Shock Calculator

The most concentrated chlorine form. Best used for slow-release sanitation,...

Get the Complete DIY Pool Maintenance Guide

Free PDF checklist including seasonal schedules, chemical balancing secrets, and maintenance tips.