Contact Time Calculator

This tool will help you determine if you have enough contact time for your chlorine-based sanitizers to be maximally effective. It is recommended that you remove organic matter with a filter (rapid sand or disc), and then add your sanitizing agent.
Fertilizer should only be added after at least 2 minutes of sanitizer contact time, since it interacts with sanitizing agents.

Pumping Rate

Pipe Information
Pipe Diameter Pipe Length Contact Time (min)
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Total Contact Time
Two minutes minimum is recommended for all types of chlorine