Thank you for all of your replies
After reading all of comments, marketing hype kicked in.
Buy discus and get little jade elephant for free yo!
I agree with Paul about the quality of discus vs ethic/moral as well as crude knowledge of Thai.
(after all, we are talking about a country that motorcycle reverse run in the traffic as if it's normal.)
Most of those beauties in the pics above were imported from Malaysia.
Seems like in Thailand the tap water contains too much chlorine and a bit too hard.
(while in Malaysia, some farms even dump tap water in directly, or so I've heard.)
I also got "advice" from some shops like;
1. If you are newbie, you should start from 2" juvies.
2. Don't WC too many time, couple a week would be fine. Since the smaller fish scales are still weak (wutttt???)
3. Food? Tetra bits+FBW are fine.
etc etc
Imagine what would my discus life would be without knowing simplydiscus.