John wrote:
Some hotels on the coast have sea water pools - how do they get the
water to fill them? - is it delivered by tanker - or do they run a
pipe out to the sea and use a pump - or is there a permanent pipe to
the sea?

Bag of salt thrown in, I'd have thought.

Ramsgate had a proper seawater pool - 'The Marina'. Bloody good it was,
until the council let it fall to bits and shut it.

Si