Frequency of use: A heavily used pool will require more frequent chlorination. Sunlight: Sunlight breaks down chlorine, so you'll need to add it more often on sunny days. Water temperature: Warmer water requires more chlorine. Rainfall: Heavy rain can dilute chlorine levels.
The consistent inability to maintain chlorine levels is also called “chlorine demand” and is most often caused by a high level of inorganic and organic contaminants in the water. Those contaminants force the chlorine to work extremely hard to oxidize them, leaving little chlorine to protect swimmers.
Bacteria, algae and microscopic contaminants, such as urine, sweat, sunscreen and beauty products, take a toll on your swimming pool's water chemistry. These substances, when present in your pool water, accelerate chlorine demand and can affect your chlorine's ability to maintain properly sanitized water.
One of the first things to look at is the pool's filtration system in run time. This is often overlooked and is crucial to the pool holding chlorine. If the skimmer basket is clogged with debris or the pump basket is clogged the pool will not circulate well.
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.
Low/No chlorine production
The factors that affect chlorine levels include the summer heat, poor filtration, bather load, and the frequency of use. It's also possible that the time period you set is too short, the chlorine output level is too low, or the filter needs backwashing.
Shock is chlorine, in a high dose, meant to shock your pool and raise the chlorine level quickly.
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.
Too much Stabilizer: A chlorine lock can occur when you have added too much cyanuric acid, or stabilizer, into your pool water. Stabilizer is a chemical intended to protect chlorine from burning off too quickly from UV rays. If you get too much of it, it can completely block your chlorine and make it ineffective.
So, to answer the question, if your Total Chlorine is high but Free Chlorine is low, it is an indication that the hot tub requires a shock treatment. This can be done by adding your weekly dose of an oxidizer like Dazzle Amaze or Mineraluxe Oxygen.
Add chlorine to your pool every couple of days as part of regularly monitoring your pool water chemistry. You can also add it in the form of pool shock when the chlorine in your pool needs a fast boost. Add chlorine after sunset and make sure no swimmers are in the pool.
Baking soda, also known as sodium bicarbonate is naturally alkaline, with a pH of 8. When you add baking soda to your pool water, you will raise both the pH and the alkalinity, improving stability and clarity. Many commercial pool products for raising alkalinity utilize baking soda as their main active ingredient.
Under normal conditions, you should add a chlorine tablet every 3-7 days. However, several factors can influence how often you need to add chlorine: Frequency of use: A heavily used pool will require more frequent chlorination. Sunlight: Sunlight breaks down chlorine, so you'll need to add it more often on sunny days.
Every swimmer introduces organic materials such as sweat, sunscreen, and body oils that instantly demolish the free chlorine residuals. Higher levels of contaminants: The mud, leaves, and other debris that collect at the bottom of the pool absorb chlorine as it continues breaking down the contaminants.
Statistically, a pool without chlorine is more likely to make you sick because of the possibility of being exposed to the things not contained or killed by chlorine. Remember, your skin is porous, so microscopic impurities can pass through. A pool sans chlorine is akin to a big puddle of murky water.
Debris or contaminants from winter or periods of inactivity. Heavy pool usage or high bather load, especially during summer. Biofilm or organic material in the water, such as sunscreen, leaves, or algae. Pool covers trapping chlorine and causing it to dissipate more rapidly.
Make sure the pool is clean and chlorine is at the proper level. Read the dosage on the bottle for recommendations. For liquid or powder stabilizer, add to the pool by walking around the perimeter and slowly adding stabilizer along the edges. If using powder stabilizer, brush pool down to promote mixing.
It's usually caused by a high level of inorganic and organic contaminants in the water. Those contaminants force the chlorine to work extremely hard to oxidize them, leaving little chlorine to protect swimmers.
Boiling water for 15 minutes also helps to remove chlorine as it causes the chlorine to evaporate. But the quickest and most effective way to remove chlorine from drinking water is with activated carbon filters in a reverse osmosis drinking water system.
The sun's UV rays break down the chlorine, and it is released into the atmosphere. In summer, when the sun is bearing down, it'll only take around two hours for 90% of the chlorine in your pool to be broken down completely.
SKIMMER NOTES: No. Chlorine and shock are not the same thing. Shock has a more intense chemical strength than the traditional chlorine sanitizers, and it also differs in how you should apply it to your swimming pool.
Typically, you will need to add chlorine tabs or granules to your pool on a constant basis. About every two weeks, you will need to shock your pool with a higher dose of chlorine. This raises the pH levels quickly and is especially important in sunny weather when the chlorine can break down.
Chlorine Tablets for your Pool
The time required to safely sanitize the pool with tablets alone is far greater than that of liquid chlorine. What you pay for convenience in the tablet, you ultimately sacrifice in timing should you let the pool water fall too far below recommended pH level.