: why does saltwater systems in pools kills bacteria and algae, while the sea is full of life?

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: why does saltwater systems in pools kills bacteria and algae, while the sea is full of life?

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The salt in saltwater systems is converted to chlorine (the Cl of NaCl which is salt), which in turn kills bacteria.

The salt in saltwater systems are passed through a electrolytic chlorine generator. This converts the salt to chlorine rather than relying on manufactured chlorine which is harsher.

some things aren’t designed to live in saltwater.

You as a human I’m assuming probably drink clean water and can’t effectively be hydrated by saltwater, if you just drank saltwater, you wouldn’t be hydrated properly because you’re not really designed to, the same kind of logic applies to different organisms. Some can effectively live in saltwater and others can’t. It all depends on how they adapted to their environment, some animals exist in both too.

Because salt water pool systems convert the chlorine ion in salt (a sodium ion with a chlorine ion [NaCl]) into actual chlorine through electrolysis. The chlorine generated kills off bacteria and algae much like a regular pool. This system eliminates the need to dump chlorine into the pool as it is generated from the added salt.