You need a saltwater system. The unit converts the salt (NaCl) to chlorine gas (Cl) within a chamber using electricity then (almost) immediately converts it back again to salt. The cycle is continuous, therefore your pool water is 'sanatized' with chlorine whenever the pool pump is running - just a little bit at a time. Apparently the technology was first adopted in Australia 30+ years ago. I just purchased a unit in Canada for CDN$1750 installed for a 18x36 inground pool.
No, a saltwater pool does not need to be covered.
You can attach saltwater system to non-Intex pro series pool.
Salt water pools
Yes, you can.
Yes it does just like a chlorine pool.
Sure, just throw it in....
Yes you still need a pump and filter. The saltwater system generates chlorine and eliminates the need for chlorine tabs. You will still need to keep the water balanced and continue normal pool maintenance.
Freshwater
Yes.
We just got an intex saltwater system online at walmart for 180 including the tax and shipping.
Yes, you can add a clear saltwater system to a ProSeries 14' X 42" Metal Frame Swimming Pool.
Sure, you CAN, but why would you want to? The purpose of the salt in a saltwater system equipped pool is to provide the chlorine the saltwater system generates. It would be the same as having a saltwater system pool that the saltwater system went bad and you just installed an inline chlorinator in the plumbing instead of replacing the saltwater chlorine generator system so you could add chlorine with the tablets.