I had them for a while (a few years ago) and they just need to eat so much that they are basically walking dead by the time they get to the LFS cause they don't get fed properly through the supply chain. I was able to keep the few that were not already too starved by using an auto feeder that fed live enriched baby brine shrimp and other copepods about 8 times a day during daylight hours. They will not train to frozen food at all. I tried cyclopeeze, ova, and frozen baby brine. I even froze a bunch of copepods that they were eating live and they wouldn't touch it. Unless you're prepared to lose a lot of them and to feed more than 3-4 times a day, I recommend you stay away. Unfortunately, theres a reason you never see them in tanks or at LFSs.