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.
How often do I need to add salt to my pool? 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.
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.
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.
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 only way to lower the salt concentration of your swimming pool's water is to dilute it. Unfortunately, this means you will need to partially drain your pool and refill it with fresh water. This is true because salt doesn't wear out, break down or evaporate; only your water will evaporate.
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. Salt stays in the water, you only need annual boosters, to replace salt lost to backwashing or splashout.
The pool's salt chlorinator creates the right amount of chlorine needed to keep your water clean, according to Hayward. While there are reasons to add extra chlorine to your saltwater pool, you must do so carefully. Too much chlorine with salt water is never a good combination.
After 24 hours you should then test the salinity and if you still need to add swimming pool salt you can repeat the process again making sure to not turn on the chlorine generator until you are completely satisfied your salinity is within the manufacturers recommended range.
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.
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.
There is no magic inside a salt-chlorine generator that balances pool water. All parameters should be checked and balanced regularly. Additionally, salt pools need to be shocked on a regular basis and salt-chlorine generators typically do not have the ability to effectively shock your pool.
A saltwater pool is an alternative to a traditional chlorine pool. Although you don't add chlorine tablets to a saltwater pool, it does still contain chlorine. It just has a smaller amount that's generated through the filter system. A saltwater pool contains 10 times less salt than the ocean.
The only time that it is important not to add salt is in the first 30 days after plaster is applied. Otherwise it is fine to go ahead and add salt. Run the pump for 24 hours after adding salt and turn off the SWG for those 24 hours.
Therefore, if you have a 20,000 gallon pool and want to determine how much salt you'll need to buy, you would use the formula “30/1,000 x 20,000”, which equals 600. Meaning, the pool would require approximately 600 lb of salt.
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.
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.
Over-salting will not harm your chlorine generator, but it will lead to salty tasting water. If levels exceed 6500 ppm the chlorinator is programmed to protect itself by alerting the user that there are high salinity levels in the pool. To reduce the salt level, drain some water and refill the pool with fresh water.
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.
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.
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.