I'm don't consider myself a paranoid person{well maybe a little} but it has only been three days and i can't help constantly checking on the discus.A quick "funny"story,this morning I woke up came around the corner and saw something orange floating in the tank and my heart fell to my knees but it was just a piece of foam that had worked it's way out of the ac 70.Do your discus occasionally swim on their sides or even rest in place sideways or are they just trying to drive me nuts?On a more serious note about feeding.These are the biggest fish i have ever had but they don't seem to eat a lot at one sitting.They are all eating and seem really like the frozen blood worms as well as the freeze dried black worms but so far won't touch the pellets.I ordered some beef heart flakes made of beef heart,shrimp and kale with no other fillers so will try this also.The question is how much do you feed your discus,how often and how much.All left over food is removed after about ten minutes.Just let me say again these guys are like little jewels i just hope I will eventually learn to relax and enjoy them.
I know what, and how, you're feeling as a first time discus keeper, but just try not to get too uptight about the feeding.
You've got a huge leg up by just having obtained some very healthy, high quality, well-fed discus from a top notch source, and if well cared for with large, frequent wcs and a clean set-up they won't disappoint you as far as eating is concerned.
You're cleaning up after any feedings, so you needn't worry about polluting the water in any way.
Try some different things - e.g. feeding only a small amount, but several times a day - mixing pellets (which you say they don't touch - probably because they've not been fed them in the past),
so mix some pellets in with foods they like (perhaps the blackworms), or add a little finely diced fresh garlic to new foods, or foods they haven't yet taken a liking to - like the pellets.
As you've already been advised above, go easy on the frozen bloodworms - that can potentially be what they crave, and it may spoil them from trying other things - and they're not that nutritious - just feed them that as a treat - maybe once or twice a week.
Remember, discus are like young children - they may get fussy as to foods, but they always seem to get enough to eat - so don't worry yourself silly over it - just do what you can, & go with the flow.
Some eat like pigs - some are just grazers - and they change their individual ways from time to time.
Get to know them better, and them you, and in a few weeks, you'll feel like an old pro, and be really amazed at their odd ways and funny antics.
Hey, that's enough of that for now. Just try to relax if you can.