I can recommend Pattaya Dive center. I did Padi wreck speciallity there, and Andy is a great instructor.
Another option is to do pool diving in Bangkok, and do sea dives later in Pattaya.. Mermaids Bangkok use a BIG and deep pool for confined water training.
Another option is to do pool diving in Bangkok, and do sea dives later in Pattaya.. Mermaids Bangkok use a BIG and deep pool for confined water training.