Hey guys just got my 2 new vulture catfish, calophysus macropterus, one at about 7 inches and the other about 5 1/2 or 6 inches. Beautiful fish came in 28 hour shipping, and I drip acclimated them with an airline hose for about 30-40 minutes before dumping them in. At first, they skated around the tank, hit all 4 sides, and now, are strangely swimming upwards against the glass near the top. From one source I found that during acclimation and stressful times, they are in dire need of oxygen, more so than the usual fish. Both of them have been doing this behavior, non stop undulating near the top, for about 3 hours. Any tips on how to calm them. I turned lights off for now and also put some shrimp pieces, and a assortment of pellets, and they definitely ate when it went by them, but they haven't searched it out yet or moved from their spots. Anyone else have this happen to theirs as well?