Introducing Wild discus to new tank

Hi all,

I have just introduced 2 piece of wild heckel(~4 inch) and 2 juveniles discus (~1.5inch) of unknown breed. The pair of wild heckel seems to be having problem settling in, it swimming on its sides and hidding at a corner. Is there any problem?? i have condition the tank for 1 week with aeration and maintain the temp at 30 degrees celsius. added water conditioner to the tank as well.

Anyone can highlight to me what went wrong?? I wont want to loss the wild heckels.