Good guess there as to why he's not taking to the bloodworms yet. BTW, are they frozen bloodworms that you're feeding him/her? If not, then go pick some up (Hikari makes great frozen food...try their bloodworms). IME, quite a few fish stores do this and I've raised quite a few discus that were kept this way (easiest way to get them to eat, but not healthy for them). I wouldn't worry too much about it since he still looks healthy and is still eating (just don't be tempted and go pick up some blackworms for him :roll: ). After awhile, he'll learn what it is and start eating it with gusto. You might also want to vary his diet up a bit with some variety, such as beefheart (you can pick these up at your LFS also, or you can make your own as there are quite a few recipes out there). Just remember to not overfeed as it'll lower your water quality.