Hi,it looks nice but a little over stocked with the 3 discus added to what was already in there.In all likely hood you'll run into some issues if you don't up your WC's to daily along with substrate cleaning.The brand of substrate your using might need to come out of a discus tank.That's where the zits are coming from(unclean water and substrate).So,some issues have already started.That's the first time I've seen red rosy barbs with discus,not sure if they'd make good tank mates.Only 3 discus = more issues with aggression.Why did you treat your tank and what with and how long??A big water change would have gotten rid of the pimple,perhaps caused by a harmless bacteria getting under a scale.Read some of the stickies for beginners,it will help.Hope thing work out well.Good luck.