There is no set timeframe of when you need to add salt to your pool. Because salt does not dissipate from your water, the only time you would add salt to your pool is when you add fresh water or after heavy rain that dilutes salinity levels.
For a newly constructed pool or freshly plastered finish, it is recommended to allow the pool surface to cure for 30 days prior to adding salt (Sodium Chloride = NaCl).
While the average salt cells used in a residential salt water pool will last around 10,000 hours of operation, or around three to five years, there are things you can do to ensure it lasts as long as possible.
Bottom Line. A little bit of extra salt in your pool doesn't generally result in any concerning issues. However, putting in excessive amounts of salt, resulting in salt levels 5000 ppm or more, can lead to corrosion of your metal pool equipment. Not to mention, having too much salt will also make the pool saltier.
The ideal salt level is between 2700-3400 ppm (parts per million) with 3200 ppm being optimal. Before adding salt to your pool, test the water to check your salt level. If the level is low, determine the number of gallons in the pool and add salt according to the chart below.
So, not only is shocking a saltwater pool okay, but it's actually important to your pool's health. Shocking is the process in which you overload your pool with chlorine (3-5 times the normal amount) to improve your pool's cleanliness and kill off organic matter.
How much salt to add to the pool? To reach the initial salt level recommended by the salt system manufacturer (usually 2400-3200 ppm), you will need to add about 200 lbs of pure pool grade salt (NaCl), per 10,000 gallons of water.
Just like a chlorine-based pool, saltwater pools turn cloudy when chemicals are not balanced. You need to ensure that all chemicals are balanced all the time to avoid cloudy water and growth of algae. The major causes of cloudiness are chlorine, pH, Salinity, total alkalinity, cyanuric acid, and calcium hardness.
For safe swimming conditions, the ideal salt level is going to be between 2500 ppm and 4000 ppm. An overly salted pool will generally not be a major problem (aside from salty-tasting water), but at levels over 6000 ppm there may be corrosion damage to some of the metallic equipment.
To add salt, turn on your filter pump and add the salt directly to your pool water. Use a brush to help the salt dissolve and to prevent the salt from piling up on the bottom of your pool. Run your pump for 24 hours to help distribute the salt evenly throughout your pool.
Overall, you need to run your saltwater generator and pool pump for at least 8 hours daily. Not running either of these long enough means not enough chlorine to sanitize the water. Remember, the pool pump needs to be running simultaneously with the chlorine generator for the salt cell to produce chlorine.
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.
A well-maintained salt chlorine generator will last 3–7 years. Replacing the salt cell costs $700–$1100. Replacing the control board costs $500–$900. You can extend the lifespans by maintaining a consistent salt level, cleaning the cell only when needed, and using the reverse polarity function.
As shocking has a tendency to push metals out of solution and salt (even when labeled as pure) can contain trace amounts of metals, it is recommended that you add salt at a different time from shocking. Have your PH and ALK within range when adding salt, and brush until it is completely dissolved.
3400 is the recomended high limit, but the readings on the panel are notoriously inaccurate. Generally it's better to have the level on the high side than low, so 3800 should be fine.
I have the same one and yes it takes about 24 hours to register salt.
Lower pH by adding muriatic acid or sodium disulfide to the water, and raise it by adding baking soda (sodium bicarbonate) or soda ash (sodium carbonate). Check the total alkalinity of the pool water before raising pH. If it's near the acceptable range of 80 to 120 ppm, use soda ash.
Salinity / Salt Levels: You should check the amount of salts in the pool once in a month for a saltwater chlorine generated pool. The ideal salt levels are 2700–3400 ppm. Calcium Hardness: Check the calcium hardness levels at least twice a year to maintain the chemical balance of your pool.
While they do cost a bit more on the front end than a chlorine set up, the ongoing maintenance for saltwater pools is typically far less expensive. Generally, you can expect to pay somewhere around $300 to $800 a year on the chemicals you'll need to maintain a chlorine pool.
Insufficient chlorine in your pool
When you add a bag of salt into the water sodium chloride dissolves and splits into two separate parts – sodium and chloride ions. Chloride won't kill algae, it needs to be turned into chlorine to do this.
Generally, it's recommended to wait about 10 minutes between adding each pool chemical. Some pool chemicals like pool salt and cyanuric acid take longer to dissolve in the pool water. The aim is to avoid strong concentrations of chemicals mixing together.