two discus pairing

hi.
i have 8ftx2.5x1.5 ft take with 17 discus . i used tap water in 200 liter store drum . ph velue about 10 and hardness unknown. but my discus is healthy and growing. i change 50% water twice in week. i have recently monitor my two discus stay close each other and they don't share food to other discus . they Chase them. Is they are going to breed ? If true what i did for this ? pls suggest . i attached my two discus and tank.Attachment 119459

tank picAttachment 119460

Hi Niladri, I would suggest for now to just watch and see what they do. Nice tank by the way :)
Pat

pls say what i watch . can i separate those fish in other tank