Question: What Does Free Chlorine Mean On A Test Strip?

What happens if free chlorine is low?

When the chlorine level is too low, microorganisms like bacteria are able to multiply faster.

With harmful bacteria like e-coli, this will quickly cause your pool to be unhealthy, risking any swimmers potentially getting sick.

Algae growth.

Algae will also grow quickly..

How do you read a chlorine test strip?

Simply dip one test strip into pool or spa water at elbow’s depth and remove immediately. Shake once to remove excess water. Hold strip level and visually compare the strip to the color chart included on the bottle. Select the corresponding test result colors within 15 seconds of wetting.

What do I do if my free chlorine pool is low?

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.

Should total chlorine and free chlorine be the same?

Put It All Together. If total and free chlorine levels are the same, there’s no combined chlorine in your water, meaning none of it has been used up yet. … In order for your pool to be properly sanitized, the free chlorine level must remain higher than the combined chlorine level.

Why is my chlorine level so low?

Sometimes, it’s just a simple case of pool owners adding too much stabilizer to the water. Sometimes this occurs when you aren’t partially draining and refilling your pool periodically. Adversely, very little or zero stabilizer also creates a demand for chlorine.

What happens when free chlorine is too high?

Excess chlorine can alter the pH level of the water in the pool, making it more acidic. The acid levels can cause any of the following symptoms: Irritant dermatitis which is a red skin rash characterized by raised itchy red bumps. Eye irritation and over-dilated blood vessels in the eyes.

Does adding chlorine increase pH?

Chlorine gas will lower your pH. … Both liquid chlorine (sodium hypochlorite) and powder chlorine (calcium hypochlorite) will raise the pH. Liquid chlorine will raise the pH more than powder chlorine. Either muriatic acid or sodium bisulfate can be used to neutralize these alkaline compounds.

Is high free chlorine harmful?

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.

Why is my total chlorine high but free chlorine low?

This occurs when too much stabilizer is added to the water or when the swimming pool isn’t being partially drained and refilled periodically. Chlorine lock can also occur if the pH is unbalanced. The quickest way to determine if a chlorine lock is present is to perform a test for total chlorine and free chlorine.

Can I add shock and chlorine at the same time?

Yes, you can add both shock and chlorine to a pool. However, you should not add them at the same time. The best thing to do is to shock your pool first. Then, once the chlorine levels go down to a certain threshold, you can add more chlorine.

Is there a difference between chlorine and shock?

Chlorine is a sanitizer, and (unless you use Baquacil products) is necessary for maintaining a clear and healthy pool. Shock is chlorine, in a high dose, meant to shock your pool and raise the chlorine level quickly.

How much shock Do I need to raise free chlorine?

The goal of shocking your pool is to raise the free chlorine level of your pool water to roughly 10 times the combined chlorine level of your pool water.

Can too much chlorine make 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.

Whats the difference between total chlorine and free chlorine?

Total chlorine is the total amount of chlorine in the water. When chlorine binds up with contaminants it forms a compound called “chloramines” that are still part of the total but no longer effective. The chlorine that is still active to remove contaminants is known as free.

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

about two hoursDecrease pool chlorine with natural sunlight On a cloudless sunny day, 90% of the chlorine level in a pool can be destroyed in about two hours.

How can I raise my free chlorine level?

Raise the Level of Pool Chlorine Raising pool chlorine can be much easier than trying to lower chlorine levels. Simply adding chlorine in the form of chlorine tablets, granular chlorine, liquid shock or powder shock will increase the total amount of chlorine within the pool.

Will Shock raise free chlorine?

“Shocking” refers to the process of adding chlorine or non-chlorine chemicals to your pool in order to raise the “free chlorine” level. The goal is to raise it to a point where contaminants such as algae, chloramines and bacteria are destroyed. … The odor actually comes from chloramines, also known as combined chlorine.

Is it safe to swim in a pool with low free chlorine?

Anything between 5-10 ppm is still safe to swim, but you are risking damage to equipment and certainly complaints from swimmers. Some experts recommend no swimming unless the chlorine is 8 ppm or less. You need to make sure your water is first balanced before expecting an effective sanitizing program using chlorine.

Does shocking pool raise 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.

Are chlorine test strips accurate?

Pool Test Strips: The most inexpensive and widely used method of water testing – test strips – is fast, easy, and fairly accurate.

What are chlorine test strips used for?

Chlorine Test Strips are used for bleach. They are also used to check chlorine levels used in low-temperature dishwashers. Look for strips that read between 0-200 ppm free available chlorine. Make sure that the test kit is for sanitizing agents, not for swimming pools or drinking water.