Expert Verified Updated: March 2026

Cal-Hypo Pool Shock Calculator

Determine how many bags of Calcium Hypochlorite shock you need for a quick chlorine boost.

Quick Conclusion
The Cal-Hypo Pool Shock Calculator provides instant dose calculations for pool maintenance, helping you maintain perfect water balance and extend equipment life.

Technical Comparison

Factor65% Cal-Hypo73% Cal-Hypo
Algae KillFastExtreme
CH AdditionModerateHigh
ResidueLowNear Zero

Why Shock?

Shocking kills algae and breaks down combined chlorines (chloramines).

Actionable Steps

Shocking with Cal-Hypo

Standard 65% Cal-Hypo is powerful and adds calcium.

⚠️

Safety Warning: Extremely reactive. Add only to water. Never mix with other types of chlorine.

Pro-Tip

Cal-Hypo adds Calcium Hardness. If your CH is already over 400ppm, switch to Liquid Chlorine or Dichlor to avoid scale building up on your salt cell or heater.

Frequently Asked Questions

When to shock?

At night, to prevent sunlight from burning off the chlorine.

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