How to lower chlorine level in spa

What happens if chlorine levels are too high?

Exposure to high levels of chlorine can cause lung irritation, skin and eye damage, and provoke asthma. Not only is it bad for your health, but it can be bad for your pool due to the increase in chlorine. High chlorine levels decrease the pH of your pool’s water, making it more acidic.

How long does it take for chlorine levels to go down?

about two hours

How do I lower the pH and chlorine in my hot tub?

In order to lower both the pH and alkalinity of your hot tub water, you will need to add acid. Common choices are liquid muriatic acid or dry sodium bisulfate. When the acid is introduced to the water, it increases the hydrogen concentration and lowers the pH.

How can I lower the chlorine level in my pool fast?


  1. Add Sodium Thiosulfate, aka Chlorine Neutralizer for instant reduction.
  2. Add Ascorbic Acid, aka Vitamin C to remove chlorine.
  3. Add Hydrogen Peroxide, aka H2O2, to breakdown chlorine.
  4. Remove chlorine naturally with sunlight, aeration and agitation of the water.

Should I shock pool if chlorine is high?

If your total chlorine level is high, you will use a non-chlorine shock; if it is low, you will use a chlorinated shock. As a rule, you will need to raise free chlorine to 10 times your combined chlorine to hit what is known as “break point.” Therefore, it is good to deal with combined chlorine while it is still small.

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Does Sun Kill chlorine?

Direct sunlight (UV)

Direct sunlight breaks down chlorine. Without a stabilizer (cyanuric acid) in the water, as much as 90% of free available chlorine could be destroyed within just two or three hours.

Does too much chlorine make your pool cloudy?

An excessive amount of pool chemicals can cause your water to be cloudy. That includes: high pH, high alkalinity, high chlorine or other sanitizers, and high calcium hardness. One of the only ways to immediately know what chemicals you’ve overused in your pool is through the pHin mobile app.

What is the highest chlorine level safe to swim in?

The Association of Pool and Spa Professionals recommends free chlorine levels be kept between 2.0 and 4.0 ppm. The Center for Disease Control recommends free chlorine stay above 1 ppm in pools and 3 ppm in hot tubs. The easiest way to check your chlorine levels is with test strips.

Will Shocking pool lower pH?

Chlorine based pool shock (Calcium Hypochlorite) has a high pH, and will naturally raise the pH level of your swimming pool water, in addition to changing your chlorine level. Chlorine free shock has a neutral pH, and will not affect any of your pool chemical levels.

What should be adjusted first alkalinity or pH?

You should test alkalinity first because it will buffer pH. Your reading should be in the range of 80 to 120 parts per million (ppm). If you need to increase the alkalinity, add an increaser. To lower it, you’ll add a sodium bisulfate.

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Does chlorine lower pH in hot tub?

The pH level indicates how acidic or alkaline something is. … The safe pH range for a hot tub is between 7.2 and 7.8—very slightly alkaline. At this pH, chlorine in the water will work effectively to keep the water clean, and, therefore, not harmful to you.

Can you go in hot tub if chlorine is too high?

You should absolutely not go in a hot tub with a high level of chlorine or bromine. To check your hot tub’s chlorine levels, you should use a test strip. Using test strips is a really easy and effective way of figuring out your hot tubs chemical balance.

What neutralizes chlorine?


Vitamin C is a newer chemical method for neutralizing chlorine. Two forms of vitamin C, ascorbic acid and sodium ascorbate, will neutralize chlorine. Neither is considered a hazardous chemical. First, vitamin C does not lower the dissolved oxygen as much as sulfur-based chemicals do.

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