How to Safely Lower High Pool Chlorine Levels

Lowering High Pool Chlorine Levels

Objective

This guide teaches you how to rapidly and safely neutralize excess chlorine in your swimming pool, allowing you to restore safe swimming conditions without the expensive and time-consuming process of draining your water.

The Accidental Overdose

We have all been there—you miscalculated the pool volume, accidentally dropped an extra bag of shock into the deep end, or your automated chlorinator was left on the highest setting. Suddenly, your test kit is reading a blindingly dark pink or yellow, and the chlorine is dangerously high.

While extremely high chlorine is excellent for killing algae, it is harsh on swimmers' skin and eyes, and over time, it can bleach vinyl liners and damage pool covers. While the sun's UV rays will naturally burn off chlorine over a few days, you don't have to wait to use your pool. By introducing a precise dose of a chemical neutralizer, you can instantly break the chlorine bonds and drop the sanitizer level back to a safe, comfortable range.

Prerequisites

  • A reliable liquid chemical drop-test kit.

  • A clean 5-gallon plastic bucket.

  • A supply of No Mor Chlor™ (chlorine neutralizer).

Step-by-Step Instructions: Neutralizing the Chlorine

  1. Test the Current Level: Use your drop-test kit to determine your current Free Chlorine level. (If the water bleaches the reagent clear instantly, you are well over 10 ppm). Your target safe swimming range is typically between 2.0 and 4.0 ppm.

  2. Calculate Your Dosage: Consult the dosage chart on the back of the No Mor Chlor™ bottle. Calculate the exact amount needed based on your pool's gallon capacity and how many parts per million (ppm) you wish to drop. Note: It is always better to slightly under-dose and retest than to accidentally neutralize all your chlorine!

  3. Pre-Dissolve the Product: Fill your clean plastic bucket halfway with pool water. Add the measured amount of No Mor Chlor™ to the bucket and stir gently until it is fully dissolved.

  4. Distribute the Mixture: Ensure your Pump Switch is set to the ON position. Slowly pour the dissolved mixture around the perimeter of the pool, allowing the return jets to circulate it.

  5. Wait and Retest: Allow the water to circulate for at least 2 to 4 hours. Retest your Free Chlorine level. If it is still too high, repeat the process with a smaller dose.

Troubleshooting Note: Preparing for Stain Treatments

No Mor Chlor™ is also an absolutely essential tool when preparing your pool for metal stain removal! Because stain removers cannot work in the presence of chlorine, using this neutralizer allows you to instantly drop your chlorine to 0 ppm so you can begin your stain treatment immediately, rather than waiting days for the sun to do it.

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