Hao, I hope this helps, I have read somewhere (wish I could post the link) that the main factor in AsianAro Farmers secrets to breeding is the GEOGRAPHIC location of the Farm, ASIAN ARO's spawning tendencies are greatly incresed if the pond/farm that they're in is located in the Equator, Climatory facors like Humidity and water parameters in these areas are VERY HARD to duplicate anywhere else in the world esp N.America and Europe thats why its only in S.E. Asian region that farms are able to successfully produce aro spawns... keep in mind, this is a "main" factor but not the only challenging factor, selecting an adequate breeding pair also poses as a big challenge