Bang Saen - I found this about water quality. Very strange...
"The sea at Bang Saen is usually not clear. But from October to February of every year, the sea at Bang Saen is as clear as the Maldives, a natural phenomenon"
I don't think it's ever as clear as Madives etc but it's good now.
I like this too being very romantic person. However, no partner yet to duplicate but still seeking;
"Its name, Bang Saen, comes from folklore about two young Chonburi lovers, Saen (แสน) and Sam Muk (สามมุก). The unrequited lovers threw themselves off a cliff and drowned together"