There are alternatives to chlorine including bromine, ionizers, and ozonators, though with each you'll still need to use some chlorine. A fourth alternative is PHMB, which doesn't require the use of any chlorine. All four have drawbacks, including cost.
As mentioned above, you could probably swim in a pool without chlorine without any major health issues. However, long-term use of a pool lacking chlorinated H2O could make you sick or, at the very least, contribute to rashes and other types of skin irritation.
I think the answer to your question is about 3-6 days. The problem is that the chlorine that you need to keep the bacteria in check is used up more quickly as the temperature rises, the activity increases, and as sweat and other body stuff is put into the pool.
It takes a lot of chemicals to make pool water safe for swimming. Untreated water can accumulate harmful Escherichia coli and Salmonella bacteria and protozoans such as Cryptosporidium parvum and Giardia lamblia.
Even from a health standpoint, it is simply not safe to operate a pool without some added “chemicals” to combat bacteria and contaminants in the water. A pool without chemicals is the perfect breeding ground for bacteria, viruses, and parasites.
A rule of thumb is 1.5 lbs. of baking soda per 10,000 gallons of water will raise alkalinity by about 10 ppm. If your pool's pH tested below 7.2, add 3-4 pounds of baking soda. If you're new to adding pool chemicals, start by adding only one-half or three-fourths of the recommended amount.
Short answer: yes. Longer answer: it depends on the formulation. The label on every bleach bottle should tell you the ratio of sodium hypochlorite (and available chlorine) in the bottle to everything else. A higher percentage is generally better, as you'll need to use less bleach to treat your pool.
As a rule, you don't add more than 2.5 pounds of baking soda in a day. Instead, start off adding the required amount (e.g., 1.25 for 10,000 gallons of water) of baking soda that can raise the alkalinity of your pool to 10ppm. You can sprinkle your baking soda over the surface of the pool, or you pour into a skimmer.
Vinegar contains acetic acid which makes it a great disinfectant. It is also acidic in nature hence removes dirt, grease and mineral deposits. If used in the right amount, its acidic nature also plays a role in lowering the pH of pool water.
Pros of Saltwater Pools
There's less chlorine and less of the heavy chemical scent and content. They're gentler on the skin, with less irritation to the eyes, hair and swimsuits. The water has a softer, silkier feel to it compared to chlorine water. They have lower maintenance costs than chlorine pools.
It is important to know what exactly bleach is before you put it in your pool. Household bleach, Clorox and liquid chlorine can all be used to sanitize a pool. They are all types of chlorine. Household bleaches such as Clorox usually contain about 5-6% available chlorine, about half that of pool liquid chlorine.
The benefits of swimming pool salt
Using swimming pool salt instead of chlorine delivers greater swimming comfort: Swimming pool salt does not give off an unpleasant odour as chlorine does. It is much less harsh on hair and skin. It does not cause your eyes to sting.
Swimming pools are a lot of fun, but maintaining one, and keeping algae at bay, can be both a chore and costly. One alternative many pool owners use to purchasing pool chemicals, is to use household chemicals such as baking soda and Clorox bleach instead.
It's safe to swim immediately after adding, but you should turn on your pool's circulation system to help it dissolve.
Shock-chlorination is an essential and effective method of cleaning the pool. But you need to have the pump circulating the water for this to be effective.
Short answer--yes. The first response, however, would be why would you use a pool without a filter? The sand filter or other filtration system is essential to the health and safety of the swimmers. It is also necessary to have a circulation pump for maximum chlorination.
The bacteria keep growing if the water is not wiped. Within 48 hours, you will see that the entire surface of the pool is covered with mold.
Blue-green algae produces toxic cyanobacteria and can grow in poorly sanitized pools, particularly in areas that receive a lot of sunlight. The slimy and often smelly film that floats on the water's surface is a distinct green color, so look carefully for it before going for a swim.
Disinfection methods for swimming pool water
In some countries, sodium hypochlorite is used for both oxidation and disinfection of swimming pools. When it is added to water, sodium hypochlorite increases the pH value. It is better to use chlorine as a disinfectant and an oxidizer at a pH value of 6,5.