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.
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.
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.
Skim the top of the pool for debris that may have settled on the pool surface. Add one pound of diluted granular shock to the water for every 7,000 gallons of pool water. Run the filter for 24 hours and retest the water. The slimy looking film can be an early onset of algae.
Run your filtration system for eight hours every day over summer. Back-wash it if you have a sand filter and clean cartridges with Filtrite Filter Cleaner and Degreaser. Add 50 grams of Sanit-eezy Performance per 10,000 litres of pool water. No-one should swim for at least 30 minutes after this.
When to Replace the Pool Water
You should replace pool water every five to seven years. As much as possible, you should drain and refill your pool during mild weather. It's to avoid pool damage caused by direct sunlight and heat. Moreover, a pool maintenance company can recommend the ideal time to drain your pool.
Dirty water becomes a breeding ground for parasites, mold, and bacterial. 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. As mentioned above, stagnant water attracts rodents and insects.
But is it safe to swim in a pool with algae? Whether mild or severe, it isn't recommended. Significant amounts of swimming pool algae welcome a breeding ground of harmful bacteria that feed on algae. These bacteria pose health risks to swimmers, most commonly resulting in a skin rash.
Here is why: Sunlight is white, which is made up of all the colours of the spectrum. The molecules in pool water absorb light from the red end of the spectrum when sunlight falls on the water. By removing the red, the light which ends up being reflected has a slightly blue hue which can vary in richness by water depth.
Although it's generally recommended that all the pool water undergo filtration every 24 hours, the pump does not need to run all the time. A proactive, productive and energy-saving maintenance activity is to remove the debris floating on the pool surface with a hand-held skimmer.
In most cases, the walls and floor of your pool feel slimy and slippery due to a lack of pool maintenance. Water chemistry is important in order to maintain clear and bacteria-free water. Generally, slippery and slimy pool walls are an early indication of bacteria and algae growth.
Borax acts as an effective pH buffer and helps prevent algae growth in swimming pools. Plus, it will leave your water looking sparkly and feeling soft.
If you see white flakes it is actually not paint but may be either calcium scale deposits or biofilm residue in your pool due to bad pool chemistry. Calcium scale deposits occur when your water has too much calcium. The white flakes may be calcium deposits that have accumulated over time.
Water Mold is a whitish, mucous-like substance that looks like shredded tissue paper when floating in the water. It is not harmful to humans, but is unsightly, and can clog equipment. Water mold usually begins in the filter lines, and by the time it becomes visible, the growth is often quite heavy.
If you need to mildly shock a 30,000-gallon pool by raising the free chlorine concentration to 5 ppm, you need 2.5 gallons of bleach. To raise it to 10 ppm, you need 5 gallons.
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.
"Heavy rain dilutes pool chemicals, especially salt and chlorine, which causes the pool to turn green. This means the water is not sanitised or healthy, so it's vital to address this.