There are no more paddy fields in Jakarta.... well not near my house anyway. And all paddy fields or any plantation are sprayed with chemicals. We have this land about 80 km away. We used to raise consumption fish like carp, gurame, catfish etc. But now we can only keep catfish because the water, which we get from a creek, is contaminated with various chemicals - incl. oil.
You're so lucky to have produced a prize winner. Here tons of people have good quality bettas so regulations are made harder. Unless I invest in a prize winner, it will take me a very long time to produce anything close to Indo SQ..... I guess this is why Asian bettas often win international shows..... And people will NEVER release their SQ females.