I'm not medicating the fish, I'm simply observing them to see if they're truly skittish or if they are indeed sick. In the main tank they stayed completely together. Never pecking each other and not coming out to eat. I didn't know if they were eating when the lights were out or what. If I was being stubborn I wouldn't have gotten a biggger QT tank. I take everyone's suggestions and together with searching books, the internet, and talking with experts who deal ONLY with discuses I try to make the best decisions. I'm sorry that you're not agreeing with what I'm doing but please don't attack me and say that I'm being stubborn. I could hear your disapproval in your comments. I KNOW that I need more than 3 and I'm fully planning on getting more but I want to assess these guys before doing so. I only have so many tanks so I'm using this 30 gallon to assess the 3, then when they're good I'll get more and QT them.Pinkertd tried to put it nicely. I will tell you straight out.
DO NOT medicate those discus your problem is they are young juvenile discus and you only have three.
Three discus is the worst number you can have. Two will pick on one till it DIES then they will turn on each other till only one very weak discus is left.
Now that you have by all indications in your post about catching them, increased the stress on these fish.
now the one that Will be picked on will have a shorter time.
You need to do one of the following to help these fish
1 put them back in the 110 and add ASAP 3 or more to your stock there are reasons that all discus owners will tell you the same thing. you can have 1 or 5 discus nothing in between unless you pay $600+ FOR A mated pair
2 separate them into their own tank one in each tank.
judging by your stubbornness to take our advice you did not research keeping discus enough. medicating discus because they don't come out to see you is not a reason to do this.