Quick Answer: What Does Free Chlorine Mean On 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 tell if there is too much chlorine in a pool?

3 Signs There’s Too Much Chlorine In Your PoolThe pH Level in Your Pool is 8 or Higher.You Notice Signs of Eye or Skin Irritation.Your Hair Feels Dry and Straw-Like.

How do I get free chlorine in my pool?

Add enough chlorine to bring the Free Chlorine count to reach the Break Point Chlorination Level. Repeat steps 1 & 2 until Break Point Chlorination level is reached or until: The combined chlorine level of your pool drops under 0.5. An overnight Free Chlorine test shows of 1.0 ppm or less.

What is a safe free chlorine level?

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.

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?

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.

Why is my total chlorine high but free chlorine low?

If the total chlorine level is higher than the free chlorine level, the difference of the two is the combined chlorine level. In order for your pool to be properly sanitized, the free chlorine level must remain higher than the combined chlorine level. This is why it’s so important to test your pool water regularly.

What is 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.

Why can’t I get a free chlorine reading in my pool?

If you test your pool water and can’t get a chlorine level reading at all it may be due to a very high chlorine demand. … Contamination, low pH or low chlorine stabiliser levels could cause this situation. The water might appear cloudy, the pool walls be slimy or the pool may look relatively OK.

How do I calculate free chlorine in my pool?

Free chlorine is the chlorinated water that has not interacted with any contaminants in the water. To properly measure free chlorine in your pool, use a FAS-DPD test kit and make sure that the free chlorine is between 1.0 and 3.0 parts per million (ppm).

Will Shock raise free chlorine?

Free chlorine is just that, free. … Shocking then releases the combined chlorine and off-gasses the contaminants, increasing the amount of free chlorine in your pool or spa. The question of whether to use a chlorinated or non-chlorinated shock will depend on how much total chlorine you have in your pool or spa.

Can free chlorine be higher than total chlorine?

If free chlorine measurements are higher than total chlorine using a DPD method, check the alkalinity and pH of the sample. … Higher amounts of bicarbonate in the water can cause small bubbles (looks like turbidity) to form which will increase the free chlorine results.

Can I add shock and chlorine at the same time?

Adding chlorine besides the shock can increase the chlorine content in the water which can make the entire shocking process useless. Hence, it is better if you don’t use the shock and chlorine at the same time. The best time to add chlorine to the pool water is after you have shocked the pool.

What if free chlorine is too high?

Pools will naturally gas-off chlorine from the surface, and very high levels can irritate airways and lungs when inhaled for prolonged periods, especially indoor pools. At chlorine levels over 10 ppm, swimsuits can begin to fade, and pool covers become damaged, and it may be unhealthy for swimmers.

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

about two hoursOn a cloudless sunny day, 90% of the chlorine level in a pool can be destroyed in about two hours.

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

Commercial pools should run their chlorine levels at 3 -5 ppm as their bather load is usually much higher. 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.