Yes, sad to say the current method of capture includes poisoning, which even the hardiest of fish will have detremental effects from. I congradulate the LFS that refused to buy from the wholesaler who utilizes this method.
I am a lucky one indeed. I got my Flame almost 7 years ago. One, if not the, hardiest fish I've ever had. She was obviously "net caught" without poison. I doubt if I will ever replace her when the time comes however. Unless I am absolutely sure about the catching method.
BTW, I also have a half-black, in the same tank. Very hardy fish, and no problems between the two. Actually three, I also have a coral beauty with these two. Had "Beauty" now five years. No problems at all.
HTH
Hermit