Yes, sea snakes can.
No.
No
Yes, saltwater pools can cause itching, although many find saltwater pools to be easier on skin than chlorinated ones.
Why?
As they are filled with SaltWater, they will taste salty... Like oceanwater
no!
Usually saltwater.
It lowers the pH
Pools used in Olympic competitions are filled with chlorinated fresh water.
They're no more or less sanitary than chlorinated pools.
Is a sand filter system or a saltwater filter system for above ground pools?