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.
Annual booster additions of pool salt are usually required, but only to replace salt lost from backwashing, splashout or lowering the water for winter. If you fully drain the pool for maintenance, you will need to replace all of the pool salt.
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.
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).
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.
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.
Every week, you should test your salt water pool's pH and free chlorine. There are test strips or test kits you can buy for this. Normal free chlorine level is 1 to 3 ppm, while pH should be at 7.2 to 7.6.
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.
Is a salt water pool easier to maintain? Yes, a salt water pool is easier to maintain! There's no need to purchase, store and add chlorine to your pool. Simply add salt and your pool's salt chlorinator will do all the work of making chlorine.
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.
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.
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.
Answer: It depends on a few factors. 1) are you closing your pool every year and therefore draining and refilling with fresh water at least a bit. 2) water chemistry - the more you have to add, the more your total dissolved solids will increase leading to the need to drain and refill.
Maintaining Proper Pool Chemistry
Salt chlorine generators require at least 3000 ppm to work at all, so if your salt level is too low to start with, you may need to add pool salt until it reaches the starting level for the generator.
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.
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.
This can lead to excessive chlorine levels which can damage blankets and pool equipment. Therefore, you should be testing your pool water's chlorine and pH levels every two weeks. Maintaining proper water chemistry will reduce the amount of work needed when you're ready to start swimming again.
You should add one gallon (or one pound) of shock per 10,000 gallons of pool water every week to two weeks. During hot weather or frequent use, you may need to shock more frequently.
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.
The overall cost of salt for a saltwater pool will vary by the type of salt that you use and the size of your pool, but you can expect to pay on average between $10 and $25 per every 40 pounds of salt (or 25¢ to 63¢ per pound of salt). Some brands may even sell a 40-pound bag of pool salt for as much as $40.