As Carl stated there are different opinions. Here are a few points that I have learned in the three weeks that I have had my Salt Water Chlorine Generator.
1. Since your chlorine is being generated by your filtering system, You will probably have to run your filter more than you ran it using traditional chlorine. Each pool is different. It has been recommended that you purchase a unit that is rated for a pool that is at least 1 1/2 to two times larger than your specific pool so the unit will not struggle to work. I have approx. 12,000 gallons and my SWCG system is rated for a 24,000 gallon pool. I would also suggest you look into a self-cleaning SWCG instead of a non-self cleaning model.
2. You will need to run higher Cyanuric Acid levels with a salt system, and you may find you need to add more (Muriatic) acid than you did before to keep your pH in check. There are other factors in controlling pH too, like areation etc.
3. The salt water and the chlorine generated by the SWCG is much healthier for you than the tablets or traditional chlorine.
4. Your initial investment will be fairly steep, the cost of the unit, the installation (if you don't DIY), the salt, and any other start-up chemicals like CYA. However, If you get your chemistry and your system run time dialed in, you will save money over traditional chlorine. A rough estimate on salt is 50 lbs. for every 2000 gallons of pool water. Pool Salt will run $7 - $10 for a 40lb. bag at most hardware stores. Start with 1/2 the estimated amount and test frequently for the salt level required by your SWCG instruction manual. Don't over do the salt or you will be draining the pool.
5. I installed my salt system in an above ground pool after replacing the liner and doing a complete re-fill. I suggest you do the same (refill only, not replace the liner). However, maybe one of the more qualified experts would comment on converting a pool that has used traditional chlorine without draining.
6. So far, I am liking my system. My pool water does have a slight salty taste and I have read that some delicate plants may not survive the backwashing of the salt water, so if there is a sewer drain or an area without vegetation available for backwash you would be smart to use it.
Hope this helps.
BTDG
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